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

Example Input: Destructive interference in waves occurs two troughs what things overlap.
Example Output: Destructive interference in waves occurs when what things overlap?

Example Input: Atoms of metals are good conductors of electricity because they give up electrons.
Example Output: Why are atoms of metals good conductors of electricity?

Example Input: Community interactions are important factors in natural selection.
Example Output:
Community interactions are important factors in what?