The answer is A. Organisms compete for limited resources. A is wrong because it has nothing to do with reproduction which is natural selection.
What are the options given?
In the mitochondrion, small molecules combine with (Oxygen) to produce (Water) and carbon dioxide.
This process releases a large amount of (Energy).
Answer:
C directing the cell to create certain proteins.
Explanation:
They differentiate through the process of mitosis.