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

[EX Q]: Changing the shape of an elastic material gives it potential energy.
[EX A]: Changing the shape of an elastic material gives it what type of energy?

[EX Q]: Absorption is the process by which the substances you consume are taken up by the blood.
[EX A]: What is the process by which the substances you consume are taken up by the blood?

[EX Q]: The process responsible for the presence of oxygen in our atmosphere is photosynthesis.
[EX A]:
What's the process responsible for the presence of oxygen in our atmosphere?