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: exercise has a positive impact on a human 's health
Who would be healthier?

Fact: scraping an object may cause small particles to break off of that object
I use a knife to chip away at what to make a sculpture?

Fact: a moth undergoes metamorphosis
A moth that experiences a metamorphosis will change?