Sample Response: The process that lead to this difference in fur color is called "natural selection." Polar Bears live in the arctic, where there is snow all around. In this kind of environment, white bears blend in well with their surroundings while brown and black bears stand out. This means that brown and black bears would be easier to spot as prey, and would not survive in an arctic environment. Since white bears are more adapted to the environment, they would survive and reproduce, creating a large population of white bears.