Answer:
I dislike biology since I suck at it
Explanation:
<span>A. If one essential nutrient within an ecosystem runs out, primary productivity will be limited.
A specific nutrient is need for every organism in the ecosystem. If this particular nutrient is diminished within the ecosystem then cellular processes will decreases and a great number of specie will die. </span>
Due to brainly not accepting my essay, I have instead included a image of it. :D