Biology

The correct answer is: A.People selectively breeding hamsters.

Explanation:

Selective breeding by humans is not natural selection; it is artificial selection, where humans intentionally choose which individuals will reproduce based on desirable traits. In contrast, natural selection occurs naturally in the wild, where environmental pressures or survival factors determine which individuals survive and reproduce.

The other examples are all instances of natural selection:

B.Insect populations developing resistance to certain pesticides: This is a case of natural selection where insects with genetic mutations...