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.

Let me give you an example: Fact: pesticides can harm animals. 
Question: What can harm animals?
The answer to this example can be: pesticides.
Here is why: The answer is present in the span of the fact.

OK. solve this:
Fact: humans require nutrients to grow and heal. 
Question: what requires nutrients to grow and heal?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
humans.