Heya!

To start, I think your curves in general lack a bit of fluidity. It's particularly apparent in your ellipses, which tend to have wobbly lines. I'd recommend doing ellipses and curves warmup exercises, as seen in lesson 1, as part of your regular practice.

Now that this is out of the way, let's look at each exercise in detail :

  1. Organic arrows look good overall, especially your second page, since the arrows tapper more from beginning to end (or vice versa) and give more sense of depth. Be careful however to make the distance between the two lines more constant and consistent with the perspective. (a few places seem off)

  2. Organic forms are good, the ellipses' minor axis follow the spine of the form. The variations of width of the ellipses in perspective could be improved, however, as this principle doesn't seem to have been applied. (and when there is variation, it looks more accidental than intentional)

  3. Your texture analysis is well done, the third texture in particular looks very interesting, and your transitions from light to dark are well executed.

  4. Your dissections don't seem to have received the same level of care as your texture analysis. When I look at the donut frosting, the lotus leaves, the elephant trunk or the garlic, for example, I feel like they were rendered without thinking how cast shadows would affect their appearance. It's as if some of the textures were not observed and analyzed properly beforehand, and were rendered based on a premade idea of what they look like. (also only using lines, instead of dark shapes) Some textures that have more volumes to them, like the pinecone or the artichoke, are well rendered however. Plus, you break the contour lines of the initial silhouette with your textures and you applied perspective to them, which is great.

  5. Your form intersections are looking good. You really did fill those pages and you kept the shapes relatively equilateral. Ellipses seem to be your biggest issue in this exercise, as their minor axis are mostly not aligned with the center lines of cylinders and cones. I see that you've used different widths for the ellipses of each cylinder, which is good, but there are places where I'm not sure the perspective was applied correctly. Some narrower ellipses seem to be farther away, considering how they interact with other 3D forms around them, but it should be "closer to the viewer = narrower minor axis, farther away = wider minor axis". I may be wrong though, it depends on how you meant your ellipses to be placed in relation to the other forms. Also, be careful when adding line weight to your shapes, there are several places where it looks too thick and messy.

  6. Organic intersections look good to me! The cast shadows could wrap around the forms a little more, and the filling of black areas could be more uniform.

All in all, I mentioned several things you could improve on, but I still consider you've completed the lesson. I actually think practicing your ellipses and curves is one of the most important points, since it will come into play in almost every exercise from now on.

As a final note, for future submissions, try to put the exercises in the same order as they are presented in the lessons. xD It will help the people giving you feedback, and they won't have to scroll up and down constantly, searching for a specific page or trying to compare the results of two different pages to judge your progress.

Keep up the good work, and have a great day!