In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[EX Q]: Question: The lungs of mammals are unique in having what? Answer: alveoli
[EX A]: The lungs of mammals are unique in having alveoli.

[EX Q]: Question: What does the cell cycle do? Answer: divide and reproduce cells
[EX A]: Divide and reproduce cells does the cell cycle do.

[EX Q]: Question: What natural process allows water to return again to the earth's surface? Answer: precipitation
[EX A]:
Precipitation are a natural process that allows water to return again to the earth's surface.