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.

[Q]: Question: What happens to a cell's efficiency as it grows in size? Answer: decreases
[A]: Decreases happens to a cell's efficiency as it grows in size.


[Q]: Question: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what? Answer: contract
[A]: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only contract.


[Q]: Question: Which of these is an example of liquid water? Answer: Rain
[A]:
Rain is an example of liquid water.