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

Ex Input:
Matter that mechanical wave energy can only travel through is medium.

Ex Output:
What is the name of matter that mechanical wave energy can only travel through?

Ex Input:
Competive exclusion princple explains why two different species cannot occupy the same niche in the same place for very long.

Ex Output:
What explains why two different species cannot occupy the same niche in the same place for very long?

Ex Input:
Warmth keeps glaciers from forming in water.

Ex Output:
What keeps glaciers from forming in water?