The white feathers of a snowy owl allow it to blend in with its environment during the winter months (snow). This is an example of? Environmental Change
Genetic Variation
Adaptation
Species

I think Adaptation, or Environmental change

Explanation:

This is because the snowy owl lives in an environment that is snowy, it needed to adapt to survive.

I hope this helps.

Good Luck

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.