Hello AHMEDHASSAN021, congrats for getting through lesson 5! Here are the comments that I have to make.

Intersections

Your organic intersections feel very weighted. they slump together really nicely. Some of the linework could use some work, especially the one at the top of the first pile. Wobbly lines not only look a little messy, but also undermine the solidity of the form that they represent.

It's good that you're thinking about how cast shadows wrap around the forms that they are cast upon. Remember to try your best to keep within the lines when darkening your shadows.

Animals

Your first bird head is appears to be a little bit two-dimensional. Remember that when we create the eye socket of an animal, we are carving into the base spherical form that we've created, so these carves would follow that form's contour lines, as opposed to being akin to a sticker being slapped onto a 3-D ball.

In your linx-like creature, I noticed some wobbly sausages. It's better to take your time when planning out a mark. Ghost as much as needed, as you really want that mark to come out clean. Another thing- some of your sausages lack contour curves around points of intersection, specifically with neighbouring sausages. These small contour curves add a great deal of solidity, especially since we don't rely on individual contour curves when using the sausage method- correctly defining points of intersection does their job really well. You can see this problem in your second canid drawing as well.

Remember that all additional forms have faces- front faces, back faces, top and bottom faces, etc. In your camel, the toes look like 2-d shapes. For Drawabox purposes, you must consider how these shapes that you see exist in 3-d, and you must draw them with that consideration in mind.

I can see that you've placed protrusions from the camel's body form to make some of its additional forms look more natural. This heavily breaks the 3-dimensionality that you've created. We should never change the silhouette of a form after creating it, as that will undermine its solidity. Instead, we should add an additional form on top of it, which would leave the original form intact and unchanged. In this case, instead of stretching out the camel's body form to fit some of the lumps on its back, it would have been better to add another form entirely to serve that purpose.

One thing I have to say about your second horse is to make sure to keep in mind how every form we draw is 3-D, and that they all intersect with one-another. You didn't draw a lot of contour lines or complete silhouettes of your forms, but everything still looks like it fits together nicely. For learning purposes, I'd say to avoid this when you're trying to study, as adding contour lines and/or completely drawing in your forms will let you have a better visual on what is actually going on in the drawing.

In your bear, make sure to communicate the curvature of some forms with your additional forms. For example, one of the forms you added near the top backside of the bear looks a little flat. Make sure to include subtle curves in these forms to communicate how they wrap around the forms that they sit atop.

The mane in your hybrid looks a little flat. Remember, even if things appear to be 2-D in a photo, they're still flat 3-D objects. Make sure to define where they connect to other forms to enforce this idea.

When looking at everying as a whole, I would say to be more careful with your lines. Try to avoid going over lines again and again as "corrective passes", like you did with the hybrid's tail. We're trying to build more confidence with linework through thinking about our lines more than what we would normally do. Remember to use the ghosting method!

I'm asking for two more drawings of quadruped animals (1 non-hooved and 1 hooved), and I want you to specifically focus on making clean linework and your forms look like they naturally interact with each other.