Your answer is going to be B
Carrying capacity is determined by limiting factors.
I might be wrong but soil?
I believe the answer here is D because it has a long term description of what an area is like.
Carboxyl group + amino group + side chain. (https://www.coursehero.com/file/p628ngj/Question-3b-of-10-1-Proteins-560559-Maximum-Attempts-1-Question-Type-Multiple/)
Hope this helps
