Peppered moths in the early 1800's were mostly white-winged insects. During the Industrial Revolution, these moths had a hard time staying camouflaged against the ash-covered environment near factories. As a result, the moths started producing more offspring that had gray wings. This gradual change in the genetics of the moth is called an?

Evolution.

Explanation:

Evolution is the gradual change that occurs in the genetics of an organism. Change in environment of an organisms play an important role in evolution. Evolution leads to the change in the physical structure of an organisms that is compatible to that environment so gradual change occurs in the genetics of the moth having gray wings which helps the moth to hide in the ash.

i believe the answer is snake.