to find a place to hibernate to move away from strong sunlight to find an environment with more food to move away from crowded environments
I gave my students this multiple choice question: Which of the following best explains why many species of birds in New England fly south for the winter months?

Only one answer is correct among these 4 choices:
- to find a place to hibernate
- to move away from strong sunlight
- to find an environment with more food
- to move away from crowded environments

Could you tell me which one is correct?

to find an environment with more food