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.

[EX Q]: Fact: usually coral lives in warm water
[EX A]: Coral get their ____ from algae?

[EX Q]: Fact: if battery in an electromagnet is active then the nail in the electromagnet will become magnetic
[EX A]: A nail can attach to metals after it receives?

[EX Q]: Fact: treating water is used to remove harmful substances before drinking
[EX A]:
The water treatment plant boiled all the water that came to them for what reason?