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: an animal requires air for survival
[EX A]: A living thing will expire if access to this is removed for a time.?

[EX Q]: Fact: flippers are used for moving in water
[EX A]: A creature that can move through liquid easily due to flippers is?

[EX Q]: Fact: a balance is used for measuring weight of a substance
[EX A]:
A balance is used to measure the what of  a substance?