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: as temperature in the environment increases , the body temperature of a reptile in that environment will increase
A reptile's body temperature?

Fact: when an electrical circuit is working properly , electrical current runs through the wires in that circuit

When a light switch is turned on?