instruction:
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.
question:
Fact: cats may compete for territory, water, food, or mates. 
Question: what may compete for territory, water, food, or mates?
answer:
cats.


question:
Fact: mammals keep warm with hair. 
Question: what do mammals keep warm with?
answer:
hair.


question:
Fact: muscle relaxation occurs when muscle fibers get longer. 
Question: What occurs when muscle fibers get longer?
answer:

relaxation.