Northern foxes can have different fur colors. They can be white, brown, or gray. The foxes hunt squirrels for food. Foxes that have fur the same color as their environment are better at getting closer to squirrels and catching them. (PICTURE 1)
The diagram above shows a population of foxes that once lived in a forest. Scientists had only seen brown and gray foxes in this forest and had never seen foxes of any other color. The diagram below shows how the population changed after many generations.
(PICTURE 2)
How did the color of the foxes’ environment change? Explain what happened to the foxes over many generations.