There are a few possible reasons why rats with white fur might be outnumbering those with black fur. First, if the environment is snowy or has lots of light-colored ground, the white rats could be better camouflaged, making it harder for predators to spot them. This means more white rats survive and reproduce. Another reason could be that white fur might be a sign of a healthy gene or immunity to some diseases, allowing more of those rats to thrive and have babies.
Imagine you are a scientist observing rats in the wild. As the rats reproduce, rats born with white fur slowly begin to outnumber rats with black fur. In three to five sentences, provide two or more different explanations of why the rats with white fur might be outnumbering the rats with black fur.
7th grade level please
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