A community interaction would be correct!
A community is when multiple populations interact with each other, in this case the dolphins and fish.
Label A: Phosphate Group
Label B: Five-carbon sugar
Label C: Nitrogenous Base
I just did this and I got it correct, I hope it helps!
Answer:
Explanation:By getting rid of the deer the tree population increased, the reason behind this is because the deers ate the plants which made less trees