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: cell division is how humans grow and repair themselves. 
Question: what uses cell division to grow and repair themselves?
[EX A]: humans.

[EX Q]: Fact: The wind has a negative impact on the respiratory system. 
Question: The wind has a negative impact on what?
[EX A]: the respiratory system.

[EX Q]: Fact: The eye is an organ that can sense photons. 
Question: What does the organ of the eye sense?
[EX A]:
Photons.