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

[Q]: Opaque is the term for matter that does not let any light pass through.
[A]: What is the term for matter that does not let any light pass through?

[Q]: Age causes reduction of elasticity in all organs.
[A]: What causes reduction of elasticity in all organs?

[Q]: Nitrogen, oxygen and argon are the three most common elements in the air we breathe.
[A]:
What are the three most common elements in the air we breathe?