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: Blood feeders can enter the host through the skin. 
Question: What can enter a host through the skin?

A: Blood feeders.
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Q: Fact: bottom dwelling organisms can be filter feeders. 
Question: What can bottom dwelling organisms be?

A: filter feeders.
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Q: Fact: Male dogs use natural aphrodisiacs in urine to mark their territory. 
Question: What do male dogs use in urine to mark their territory?

A:
Natural aphrodisiacs.
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