It helps male birds find a mate. It helps the birds find food more easily. It helps hide the birds while they sit on their nests. It helps the birds find the flock when migrating.
I gave my students this multiple choice question: Indigo buntings are birds that nest in Florida during the summer. Male buntings are bright blue in color while females are a dull brown. How does the dull brown color of the female buntings help the species survive?

Only one answer is correct among these 4 choices:
- It helps male birds find a mate.
- It helps the birds find food more easily.
- It helps hide the birds while they sit on their nests.
- It helps the birds find the flock when migrating.

Could you tell me which one is correct?

It helps hide the birds while they sit on their nests.