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: The change of the Earth's distance from the sun causes the amount of daylight to decrease. 
Question: The change of the Earth's distance from the sun causes the amount of what to decrease?
[EX A]: daylight.

[EX Q]: Fact: Plants respond to green manures to disrupt plant disease. 
Question: Plants respond to what to disrupt plant disease?
[EX A]: green manures.

[EX Q]: Fact: irradiating food can be used to kill bacteria in food. 
Question: What can be killed in food by irradiating it?
[EX A]:
bacteria.