Hi I'll be giving your work some critic

Your organic arrows are quite good the spaces inbetween the arrows are smaller in the back and wider closer to the viewer however I can see there are some arrows were the line gets slightly wobbly and uncertain.

For your organic forms there are some cases where your ellipses go out of bounds which breaks the illusion of form try ghosting them more in order to avoid this I'd also recommend you work on the degree's of your ellipses for the most part a lot of them have similar degree the ellipses near the middle for example should be much more narrow then the ones on the edges the same applies to the contor lines the ones near the end of the form should curve much more then the one closer to closer to the viewer even if we're looking straight at the form.

As for your texture you're drawing the cast shadows instead of lines which is good however I would suggest your shadows near the more dense side of the texture should be more thick as its supposed to be were the shadows are at there largest I also feel like you could work on the transition from dense to very little texture as it feel mostly the same for most the texture just that the shadows get thinner on the side closer to the light there should be barely anything for example.

For you're dissections you should break the silhouette more then you did remember the silhouette is the most important and first thing our eyes notice when looking at texture I also feel like the textures don't warp around your forms if you were draw pebbles for example the texture should be very bunched up and warped near the edges for example your orange skin should have lots of cast shadows and texture bunched up together near the edges and barely any in the center.

Your form intersections are pretty good for the most part none of your boxes have inconsistent foreshortening which is good as its the main thing you should focus on with this lesson however your intersections could use some work for example on your second page on the left you have a box and cylinder intersect and the intersection ignores the side plain of the box which is incorrect try to find some objects around your house leaped like boxes balls and cylinders and if you feel confused on how the intersection would wrap around a form look at your object and feel around the surface of it as it helped me understand the surfaces of my forms

Finally you're organic intersections the first thing I would recommend Your do is add some line weight to some of your forms to help show which ones are in front of the other I also notice the ends of some of your forms seem to just float there which is incorrect think of there being two heavy rocks on the end of each forms and unless there's something underneath to support it the end of the form will hang down.

I hope my critic helped you in some way and remember to keep doing these exercises to improve your understanding of 3d space and form think of it like working out you don't do pushup's once and never do it again you do it on a near daily basic around 10 minutes of lesson 2 exercises is good enough