D: food availability for the moose and disease for the wolf
Biotic factors of an ecosystem are all the living organisms that affect other organisms in an ecosystem and include animals, plants, microorganisms, dead organisms, and even animal waste. Example of biotic factors include: Grass as producers (autotrophs).
Ecosystems can only have so many organisms living in it before the vegetation’s can’t break it all down.
Answer:
an herbivore is the right answer because he only eats grass (plants)
