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: chromosome duplication occurs when cell division produces gametes. 
Question: chromosome duplication occurs when cell division does what?
[EX A]: produces gametes.

[EX Q]: Fact: an automobile engine transforms chemical energy into sound. 
Question: an automobile engine cn transforms chemical energy into?
[EX A]: sound.

[EX Q]: Fact: Mammals that are therians house the embryo until it is complete during pregnancy. 
Question: Mammals that are what house the embryo until it is complete during pregnancy?
[EX A]:
therians.