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.

Q: Fact: Stimuli can cause the brain to experience pain. 
Question: What can cause the brain to experience pain?

A: stimuli.
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Q: Fact: Without hair, 90 percent of the body's heat would be lost. 
Question: What can prevent 90 percent of the body's heat loss?

A: hair.
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Q: Fact: Fine, dusty particles erupted from volcanos decrease the temperature by blocking the sun. 
Question: How do fine, dusty particles in the atmosphere  erupted from volcanoes lower the temperature?

A:
by blocking the sun.
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