Because organisms at different tropic levels get their energy from the organisms at the lower tropic levels.
Answer: Resource partitioning
Explanation:
In order to make organisms of different species (competitors) coexist, limited resources are to be divided with a ecological area.
Organisms of same species could be made to live together, so as to reduce wastage of limited resources
A. 0.5 chance
b. 0 chance
c. 0.5 chance