Hello,

Lines

For your superimposed lines, one of the criteria was that the only side that should fray is the end side. In your work, both sides are fraying which shouldn't be the case. Ghosted lines and ghosted planes look alright as they are confident.

Ellipses

For the ellipses in tables, it looks fine as the ellipses appear snug in the tables you created with only subtle overlapping. For all the ellipses exercises, you also superimposed the ellipses 2 to 3 times which was one of the main criteria. This part is fine.

Boxes

The box exercises are mainly fine. The lines used look a bit rough, but you did follow the concepts listed on the organic perspective and plotted perspective. For the rotated boxes, its difficult to make out what is done because the lineweight you use is uniform. The boxes themselves also also inconsistent but its not easy to get it the first time. I would recommend attempting it later when you get more proficient with perspective.

When attempting the 250 box challenge, you should try to make the visible sides and the sihouette of the box darker, as to not confuse the viewer. Also, in the future, I would suggest spending a little more time on the exercises.