Biology

The correct answer is: C.The ability of an organism to survive and reproduce in its environment.

Explanation:

In the context of natural selection, fitness refers to an organism's reproductive success—that is, how well an organism is able to survive, find a mate, and produce offspring that can also survive and reproduce. The more offspring an organism produces that can themselves reproduce, the higher its fitness.

The other options are incorrect because:

A.The physical fitness of an organism: This refers to an org...