Why are variations beneficial in natural selection

Variation is the slight difference in the genotype of the individual than the parent’s traits. So, the variation causes the evolution that helps in increasing the frequency of natural selection of creatures.

Explanation:

By the variation, the characteristics of individuals changes, some become faster, more intelligent and some become more fool, in this way the nature adopts the intelligent and fast enough creatures to survive and other to disappear in nature. Variation is a key to evolution and helps in the natural selection process.This unique character actually interacts with the environment and helps in the game of natural selection.