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: combining an egg and sperm increases genetic diversity. 
Question: what increases genetic diversity?
[EX A]: combining egg and sperm.

[EX Q]: Fact: cross-pollination increases biodiversity. 
Question: What increases biodiversity?
[EX A]: cross-pollination.

[EX Q]: Fact: When light enters the eye through the pupil, receptors in the eye perceive light. 
Question: What part of the eye perceives light when light enters through the pupil?
[EX A]:
receptors.