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: when the seasons change from summer to autumn, the amount of daylight will decrease. 
Question: What decreases when the seasons change from summer to autumn?
[EX A]: daylight.

[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: The fallopian tubes are used when having offspring. 
Question: What are the fallopian tubes used for?
[EX A]:
when having offspring.