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

Input: Consider Input: An excellent solvent that holds heat well and allows hydrogen bonds, water substance has many properties critical to life.

Output: An excellent solvent that holds heat well and allows hydrogen bonds, what substance has many properties critical to life?

Input: Consider Input: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.

Output: What is the term for the skeletal structure of the head that supports the face and protects the brain?

Input: Consider Input: Solid -> liquid -> gas of these shows how frozen water changes as the temperature of the air increases.
Output: Which of these shows how frozen water changes as the temperature of the air increases?