I think the answer to this is structure C
Answer: It is known as ecological homeostasis to the exchange that takes place between diverse natural means that allow to maintain a balance within an ecosystem. These adjustments are considered necessary to achieve survival. Usually these homeostatic balances can be understood by observing populations or systems that depend on each other.
Explanation:
Can't help you with this answer
I took the test and the answer is not shear, so don't put that one. My next choice would have been strain.
