Question

What does a food web diagram illustrate?

Answer 1

The answer is D.all feeding relationships in an ecosystem. A and C are off topic, and B is talking about a Food Chain Like the one that shows the producer to the top, when a food web shows all of the possible outcomes of the animal 

Answer 2

OK First we need to eliminate 2 answers which would be A and C

that leaves B and D

I believe the correct answer is D

because it explores all of the relationships of the food web as to just one.

hope this helps