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: Nails prevent injury by forming protective plates over distal ends. 
Question: Nails prevent injury by forming protective plates over what ends?
[EX A]: distal.

[EX Q]: Fact: hairy animals nourish young with milk. 
Question: How to mammals nourish young?
[EX A]: milk.

[EX Q]: Fact: most invertebrates have a complex computer network in their body.. 
Question: Most invertebrates have a complex what in their body?
[EX A]:
computer network.