Starting with your arrows, these are flowing quite confidently and fluidly through space. One thing to keep in mind though is that perspective applies to all space equally - the positive space (the ribbon itself) and the negative space (the distances between the zigzagging sections). In a number of these, you tend to have the gaps get really big as they get closer to the viewer, but the size of the arrow/ribbon itself doesn't seem to get bigger at the same rate, often doing so much more gradually. Be sure to work on keeping them more consistent in the future.

The sense of flow carries over nicely into your leaves, and for the most part you're doing a good job of adhering closely to the previous phase of construction when adding additional complexity (usually in adding greater edge detail and so on). Your ivy is the only one that has a few little issues where the relationship of the more complex edges are a touch looser in places to the previous phase of construction - elsewhere you've done a great job of sticking to it closely, and therefore solving first the problem of how the leaf moves through space, then building the detail onto it to maintain the same sense of movement through the scene.

Your branches are similarly well done - you've got a few 'tails' where your segments tend to drift off the path of your edges and stand out, but this is quite normal. One thing you can do to address this is to make a point of having the next segment overlap the end of the previous one directly, rather than being drawn where the last one ought to have been. This will force you to contend with cases where those previous strokes veer off their intended path, which gives you a greater motivation to actually fix the problem rather than letting it slide.

Your work throughout the plant constructions are largely quite well done. You apply the principles of construction quite effectively and achieve objects that feel quite solid and believable throughout. I'm very pleased with how fastidiously you build your forms up step by step, and how conscientious you are in regards to drawing each and every form in its entirety to thoroughly establish how each form sits in space relative to one another. There are one or two places where you break away from this, which I'll touch upon in a moment.

There is one relatively minor issue that did catch my eye. You're generally very good about using cast shadows effectively throughout your drawings to help separate forms from one another and generally clarify some of the clutter that comes from being thorough with your construction. There are however places where you start getting into the territory of mixing up cast shadows with form shading. Cast shadows are specifically projected from one form onto another surface, when the light source is blocked from reaching that surface. They are fundamentally different from form shading, which is where the surface of a given form gets lighter or darker based on that own surface's orientation relative to the light source. Basically, when turning it towards the light makes it brighter, turning it away makes it darker, etc. This form shading is something we specifically aren't utilizing in the work for this course, as discussed back in lesson 2, particularly when it is used as a sort of decoration with no further purpose.

I suspect you're aware of this - you avoid utilizing form shading in most cases, and do focus mostly on cast shadows, but there are a few places (such as along the inside of this flower pot, and throughout this plant).

That last one in particular is really the only major problem in your entire submission, and it is specifically because you lost focus on what the exercise you were doing was really about. All of these drawings are just that - exercises, specifically helping us to develop stronger spatial reasoning skills and a better grasp of how the forms we draw exist in 3D space and how we can manipulate and combine them to create more complex, believable forms. Here, you got caught up in making a pretty drawing, and in doing so you lost grip on some of the great things you were doing previously - for example, looking at the petals/leaves along the top, you stopped drawing them in their entirety, instead only drawing them where they weren't overlapped by another. Then there's the focus on form shading. All of these drew your focus away from where it should have been.

Long story short, your work is really fantastic, but you need to avoid the trap of getting too caught up in making something to pin on your refrigerator. Remember that each of these drawings are just exercises, and that what I'm teaching you is all about how to manipulate forms in a made-up 3D space. You can worry about making things pretty elsewhere.

So! I'll go ahead and mark this lesson as complete. Keep up the great work.