Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: An example of migration is birds flying south in the winter
Birds go south to look for?

Fact: a spider web is used to capture food by spiders
Hitting a spider web with your hand makes it impossible for a spider to?

Fact: an animal requires nutrients for survival
nutrients from food and water are necessary to an organism's?