Which of the following has not resulted in the decline of cheetah populations? a. population bottleneck b. overhunting c. habitat destruction d. large genetic diversity

Genetiic variation is simply the different variety of   genetic make up  and what is called alleles. Alleles are similar to a code for the body which determines such things as hair color, eye color, height, and other factors. 

Genetic variation is therefore the variation between genes and alleles, within a small or large group of people. A small group of people would for example be a family. A large group of people would for example be  the population of a certain geographic region such as a country.

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explanation:

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.