The answer I believe would be C ammonification
Answer:
A. selective pressures that favor certain individuals
Explanation:
They do the same thing that all living and breathing things do! They breathe! When they breathe they are doing the same thing you are doing all day everyday. Inhaling oxygen and exhaling carbon dioxide.
Its B clearing and farming. Because if you think of it when someone clears trees and bushes they most likely won't come back.
