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

Ex Input:
Light retains its original color under water because frequency remains the same when light is refracted.

Ex Output:
Light retains its original color under water because what remains the same when light is refracted?


Ex Input:
Mechanical waves term describes waves that travel through matter.

Ex Output:
What term describes waves that travel through matter?


Ex Input:
North pole location on earth has the least intense sunlight on december 22.

Ex Output:

Which location on Earth has the least intense sunlight on December 22?