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: camouflage can be used for hunting for prey
if a predator wanted to catch its meal undetected, which method would be effective?

Fact: a candle is a source of light when it is burned
who would see better through an underground tunnel?

Fact: a flashlight emits light

Flashlights?