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: Female mammals have breasts. 
Question: What has breasts?
Female mammals.

Fact: Cold fronts cause lightning. 
Question: Cold fronts cause what?
lightning.

Fact: Some crustaceans feed on phytoplankton. 
Question: Some crustaceans feed on?

phytoplankton.