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: The bonds of that which when heavy is Deuterium cause water to expand when it freezes. 
Question: The bonds of that which when heavy is Deuterium cause what to expand when it freezes?

A: water.
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Q: Fact: Bacteria in soil coverts atmospheric nitrogen into a form usable by flowers. 
Question: What converts nitrogen for flowers?

A: bacteria.
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Q: Fact: claws are used to catch mice by some predators. 
Question: what do predators use claws to catch?

A:
mice.
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