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: air is required for breathing. 
Question: What is required for breathing?
[A]: air.


[Q]: Fact: Populations of the cause of influenza do not grow through cell division because they are not cells. 
Question: The cause of what doesn't grow by cell division?
[A]: Influenza.


[Q]: Fact: a cell converts oxygen and carbohydrates into carbon dioxide, water, and energy in the mitochondria. 
Question: Where does a cell convert oxygen and carbohydrates into carbon dioxide, water, and energy?
[A]:
In the mitochondria.