Abiological species is composed of organisms that:
a. exploit the same ecological niche.
b. interbreed and are reproductively isolated.
c. live in the same general geographic region and interbreed.
d. are phenotypically identical

Option C

Explanation:

A biological species can be defined as the concept which includes the group of individual which lives in one or more population that can reproduce among each other to produce viable species.

Speciation is the phenomenon by which one group of species gets separated from another. The species gets diverge due to reproductive isolation or due to geographical isolation.

Hence, the correct answer is option C