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.

Fact: Disease-causing tiny living cells have a negative impact on the body. 
Question: What can cause disease, and have a negative impact on the body?
Tiny living cells.

Fact: Passenger pigeons could not produce enough offspring. 
Question: What could not produce enough offspring?
passenger pigeons.

Fact: earthworms are good for daisies. 
Question: what are earthworms good for?

daisies.