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: pollen is made by haploid plants. 
Question: what makes pollen?
haploid plants.

Fact: if a gas is heated the density decreases. 
Question: What happens to the density of a gas when heated?
decreases.

Fact: a prism is used for refracting rays or beams. 
Question: what is a prism used to refract?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
rays or beams.

