the amount of sunlight present the fox's habitat the fox's genes the fox's age
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the winter, the fur of the arctic fox is white. In summer, the fur darkens to a reddish brown. What most likely causes the fur of the fox to change color?
Possibilities:
- the amount of sunlight present
- the fox's habitat
- the fox's genes
- the fox's age

the fox's genes