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: chlorophyll is used for absorbing light energy by plants
The leaves of a plant benefit from?

Fact: cows only eat plants
If a cow is offered a choice, it will turn down?

Fact: a mouse gives birth to live young

A mouse give birth to ____ while a bird give birth to ____?