Organic Arrows

Lines look confident, arrows get bigger the closer they get to the viewer.

They look 3d, nice variety, good job!

Organic forms

Nice, even sausage forms, no pinching or excessive swelling. I like how you varied the angle of the ellipses.

Remember though that the angle change is relative to the viewer (we see less of the ellipses that are perpendicular to the viewer's line of sight - I'm referring to this image from the lesson)

Texture Analysis

Nice work, it looks great. :)

Dissections

A little blurry, but the dissections look good. I don't see any random lines/scribbling and the textures wrap around the forms. I like the fact that you let the texture come outside of the border or the sausage; it helps sell the idea of a 3d form in space.

One thing you can practice in the future is to try and gradate the texture around the form, darker towards the edges and lighter, it would make it look even more 3d (hope the way I worded it makes sense)

Intersections

The forms are well done, they look like they belong in the same space. While drawing the actual intersections is optional, I will give my two cents since you added them.

Without a difference in line weight, it's a bit hard to distinguish which form is in front of the other. I have, however, drawn a bit over your work (sorry!) to show how I would've approached it. It's not the only correct way, merely one solution.

here are the few I looked at

Something to note: Intersections between two curved surfaces or between a sphere and other forms cannot be a straight line. Also, intersections between shapes without curves cannot be curvy. (referring to page two, the intersection between a pyramid and the flat edge of the cylinder)

Organic intersections

Great job here, forms look like they are laying on top of each other. The cast shadow looks correctly drawn too.