Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

[Q]: Fact: skin is cooled by evaporation. 
Question: What cools the skin?
[A]: evaporation.


[Q]: Fact: Heat energy makes digestion easier. 
Question: What does heat energy do?
[A]: makes digestion easier.


[Q]: Fact: If a gas is heated then that gas will cool off. 
Question: If a gas is heated, then that gas will what?
[A]:
cool off.