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

Ex Input:
The tilt of earth on its axis is one factor that contributes to seasons occurring in new york state.

Ex Output:
What is one factor that contributes to seasons occurring in New York State?


Ex Input:
You call the hard case that surrounds the soft parts of some animals the exoskeleton.

Ex Output:
What do you call the hard case that surrounds the soft parts of some animals?


Ex Input:
Mutation is essential in order for evolution to occur because it increases genetic variation and the potential for individuals to differ.

Ex Output:
What phenomenon is essential in order for evolution to occur because it increases genetic variation and the potential for individuals to differ?