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.

Input: Consider Input: Fact: Heat is necessary for the survival of animals. 
Question: What is necessary for the survival of animals?

Output: heat.


Input: Consider Input: Fact: Genetic traits are passed down to offspring through chromosomes. 
Question: How are genetic traits passed down to offspring?

Output: Through chromosomes.


Input: Consider Input: Fact: homeless cells grow out of control. 
Question: homeless cells grow how?


Output: out of control.