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: sharks have tails. 
Question: What has a tail?
[A]: sharks.


[Q]: Fact: Heat is necessary for the survival of animals. 
Question: What is necessary for the survival of animals?
[A]: heat.


[Q]: Fact: bacteria are found in soil. 
Question: Where are bacteria found?
[A]:
soil.