instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Age causes reduction of elasticity in all organs.
answer:
What causes reduction of elasticity in all organs?


question:
Ice masses, acquifers, and the deep ocean are examples of water reservoirs.
answer:
Ice masses, acquifers, and the deep ocean are examples of water what?


question:
Tonicity describes the amount of solute in a solution.
answer:
What describes the amount of solute in a solution?