Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Stirring, surface area, and temperature affect the rate at solute dissolves what occurs.
[A]: Stirring, surface area, and temperature affect the rate at which what occurs?


[Q]: Air quality is a measure of pollutants in the air.
[A]: Air quality is a measure of what in the air?


[Q]: The long bone work as lever.
[A]:
What type of function does the long bone perform?