Why is genetic variation important

Explanation:

because populations can survive in a variety of different situations and because the environment is constantly changing and different alleles are favored. Genetic variation is important to the population's ability to survive in different situations that affect natural selection.

answer; /// i believe the name your looking for is called (plaque)or check good luck

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.