TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Soft of these best describes the way a feather feels.

SOLUTION: Which of these BEST describes the way a feather feels?

PROBLEM: Optics explains the behavior of visible light and electromagnetic waves.

SOLUTION: What type of physics explains the behavior of visible light and electromagnetic waves?

PROBLEM: Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.

SOLUTION:
Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?