this is intriguing, I'll be dropping some critics on this exercise to the best of my ability.

organic arrow: your line weight are not superimposing on your lines so put more effort on that and don't try to correct a line you already made by drawing another line on top of it, once you make a confident line leave it move on to the next.

organic forms: is also perfect but some of your ellipses degree are the same, the ellipses facing the viewer will be 90 degree while the ellipses facing away from the viewer will also be 90 degree but it depends on how you construct your sausage form, the ellipses tilting from the viewer will be 45 degree while the ellipses which is side is facing the viewer will be 0 degree but in this lesson we're only making use of the 90 and 45 degree of ellipses because our form isn't flat like and it's looks round, in order for us to create a great convincing illusion of depth in our 2d drawing to make it looks 3d to make it looks like the form is really round like we won't be using the 0 degree ellipses. if you don't understand this you can go through the notes and with continues warm-ups, you'll improve.

texture and dissection exercise are great.

shape intersection: add shading to rest of your forms.

organic intersection: great. and don't forget to drop some critics on mine, let's help each other improve by cooperating and helping each other out .

good luck on your next lesson.

and also warm-ups on organic arrows and organic forms