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: Dilation occurs when cell walls ease up. 
Question: What occurs when cell walls ease up?
answer:
dilation.


question:
Fact: Some insects communicate with chemicals called pheromones. 
Question: How do some insects communicate?
answer:
pheromones.


question:
Fact: The polar bear has extra fat to insulate the body. 
Question: What does a polar bear have to insulate its body?
answer:

Extra fat.