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

Ex Input:
A bow wake is created when the wave source moves faster than the wave propagation speed.

Ex Output:
What is created when the wave source moves faster than the wave propagation speed?

Ex Input:
Ice masses, acquifers, and the deep ocean are examples of water reservoirs.

Ex Output:
Ice masses, acquifers, and the deep ocean are examples of water what?

Ex Input:
Terrestrial biomes are associated with land, while aquatic ones are associated with water.

Ex Output:
Terrestrial biomes are associated with land, while aquatic ones are associated with what?