Hello Farbror_Barbro, I'm ThatOneMushroomGuy and I'll be the TA handling your critique today.

Arrows

Starting with your arrows your lines are looking fairly confident and smooth, which helps communicate a nice sense of fluidity in your arrows as they move through the world. You're keeping foreshortening in mind while constructing your arrows which allows you to make really good use of perspective and the depth of your page, this gives a nice extra layer of tridimensionality to your arrows.

Your usage of hatching helps you establish how your arrows twist and turn in space and further your own understanding of the tridimensional space these objects occupy, as a finishing touch to your arrows don't forget to make use of added line weight on top of the overlaps to reinforce their depth.

You've done a good job here, I'd like to encourage you to keep experimenting with the different kinds of twists and turns and different rates of foreshortening that are possible for arrows, remember that these are very flexible objects that can move freely across the world in all sorts of ways, so you should push yourself and explore the different possibilities in order to keep honing your skills.

Leaves

The linework for your leaves is looking smooth which helps communicate their fluidity and sense of energy, it's good that you're not only trying to capture how these structures sit statically within space, but also how they move across it from moment to moment.

However there are also some unnatural bends present in your leaf structures. Keep in mind that even though leaves are very flexible structures, that mostly applies to their length and not their width. They're like a piece of paper, not a piece of rubber, they can fold and bend in a lot of ways, but they can't stretch or compress, and if we try to force them to they'll simply rip apart.

When it comes to your addition of edge detail in some of your constructions you need to spend more time with the execution of each mark - because there are so many and they seem individually unimportant, you're putting less time into each one and so they do not properly rise off and return to the existing stroke - there are often gaps, overshoots, and sometimes zigzagging marks which is a mistake that could be avoided by putting more time into the work. No mark you draw is unimportant - if you decided it was worth adding, it's worth giving as much time as it needs to be done to the best of your current ability.

Branches

Moving on to your branches they are coming along really decently made as you're generally following the instructions for the exercise, but they can still be improved. While it's good to see that you're drawing your edges in segments you're not starting your new segment back at the previous ellipse point and superimposing it on top of the preexisting mark, you're starting your new segments close to where your previous mark ended, which partially removes the healthy overlaps we seek to achieve in these structures.

So remember how branches should be approached, by having your segment start at the first ellipse point, extending it past the second ellipse and fully up to the halfway point to the third ellipse, afterwards you'll start a new segment, making sure to place your pen at the second ellipse and repeat this pattern until your entire branch is complete.

For ellipses it's good to see that you're making an attempt to always draw through them twice, as that allows for a smoother mark overall. When it comes to your application of the ellipse degree shift to your branches it can be improved, as it stands your degrees are too consistent and hardly change which is a mistake that flattens your structures. Remember that as a form shifts in relation to the viewer, so will the degree of the ellipses within that structure also shift.

Plant Construction Section

And lastly let's take a look at your plant constructions, which are generally coming along well made, as you're following the construction methods and techniques introduced in the lesson which allows you to construct really solid looking and believably tridimensional structures. I can see a good developing sense of spatial reasoning in these pages.

This is all very good and it's helping you develop a strong sense of spatial reasoning, there are only a couple of small things that if kept in mind will help you take your work to the next level.

When approaching cylindrical structures such as plant pots make sure to start with a minor axis in order to keep your several ellipses aligned to each other more easily. Going further don't forget to construct the outer rim that's present in most types of plant pots, and make sure to add a ground plane to your structures, this line is necessary when constructing plant pots because otherwise your structure will look like it's floating in mind air, which breaks the illusion of the construction.

Make sure that you're always drawing through your forms and constructing them fully, I've noticed that in some of your constructions you don't draw through some of your forms, such as the petals in this rose construction this limits your ability to work through these tridimensional puzzles and limits how much you're getting out of the exercise. Not drawing through your forms means relying on your observation skills, instead of engaging your sense of spatial reasoning and truly trying to understand how the object you're drawing works, where it comes from, what it attaches to.

You're not making use of edge detail in your pages, edge detail would have greatly helped you further communicate the form of your structures and how they move through space, but by not adding it they're left very simple, so make sure to add edge detail whenever possible, and remember that only the last step of leaf construction - texture - is optional.

In this [hortensia(https://imgur.com/a/URZzsQZ) construction we can technically see an example of you skipping your construction steps, because you haven't constructed each individual leaf structure with the leaf construction method - however this is not really a mistake, due to the nature of this course and how it teaches certain skills it's fundamental that we're always making use of the construction techniques and methods we learn to our constructions.

But certain structures are just way too complicated and it's not feasible to draw them with the methods introduced, it is simply impossible to fully draw each individual leaf structure or branch structure in a plant such as this one while still following the instructions for this exercise, as such avoid picking trees and similar structures as a subject to study in this lesson.

Final Thoughts

In general your work is looking really good, you're starting to understand the purpose of these techniques and exercises and making use of them in your work effectively, as such you demonstrate that your sense of spatial reasoning is developing really nicely.

I'm going to be marking this lesson as complete. Good luck in Lesson 4.