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: living things all require energy conservation as a trait. 
Question: living things all require energy conservation as a what?
[EX A]: trait.

[EX Q]: Fact: Bulbs require electrical energy to see in darkness. 
Question: Bulbs produce electrical energy to what?
[EX A]: see in darkness.

[EX Q]: Fact: loss of a form of oxygen has created an hole over Antarctica. 
Question: Loss of what has created a hole over Antarctica?
[EX A]:
a form of oxygen.