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

[Q]: Hybridization model model helps explain molecules with double or triple bonds.
[A]: Which model helps explain molecules with double or triple bonds?


[Q]: Oil is the most commonly used source of energy in the world.
[A]: What is the most commonly used source of energy in the world?


[Q]: An excellent solvent that holds heat well and allows hydrogen bonds, water substance has many properties critical to life.
[A]:
An excellent solvent that holds heat well and allows hydrogen bonds, what substance has many properties critical to life?