Answer:
Step-by-step explanation:
The boxes are shaped in this order from top to bottom
A
B
C
D
E
A: Is either the very seep region or 2660. There's not enough information to tell which.
B: I take this to be a very steep region. 2750 is above 2500. The lines are very close together, but the general direction is up. The answer can also be 3300.
C: The river flowing east. (and then going south).
D: I don't see anything representing D. D should be coming down from 2500. The consequences of that not being true is that the river will not flow through the line marked 2500.
E: Depression