Which one of the following statements is TRUE?

A. Natural selection works on variation already present in a population.

B. Natural selection works on nonheritable traits.

C. Individuals evolve through natural selection.

D. Individual organisms evolve structures that they need.

option A

Explanation:

correct answer is option A

the true statement. is Natural selection works on variation already present in the population

the process of Adaptation of organism according to the environment and other natural reasons which tends to survive and produce offspring is called as Natural selection.

Natural selection theory of its action was given Charles Darwin.

hence, the correct option comes out to be option A