A species of small lizard has three color forms,pale gray,brown,and black.In its original range,the colors of the rocky environment were mixed from pale gray to very dark,and the population had an even mix of all three color forms.The blending of colors with their environment helps the lizards hide from predators.A group of these lizards ended up on an island with all gray rocks.Eventually,only gray lizards remained.This is an example of

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This scenario describes directional selection, where the gray color form was favored over the brown and black forms due to the matching environment. This resulted in a shift in the frequency of the color forms towards the gray individuals over time.

A Species of Small Lizard Has Three Color Forms,pale Gray,brown,and