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.

[EX Q]: Fact: Amphibians have a larynx to make sounds. 
Question: What do amphibians use to make sounds?
[EX A]: Voice box.

[EX Q]: Fact: Fanning a fire helps it to continue burning. 
Question: What can help a fire to continue burning?
[EX A]: Fanning it.

[EX Q]: Fact: a prism causes a rainbow. 
Question: what does a prism form?
[EX A]:
rainbow.