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

Example Input: Lying with their mouths open, a behavior called gaping, probably serves the function of cooling down for crocodiles.
Example Output: Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles?

Example Input: Surface tension is responsible for the fact that small insects can walk on water.
Example Output: Surface tension is responsible for the fact that small insects can do this on water?

Example Input: Monatomic ions form when a single atom gains or loses electrons.
Example Output:
What form when a single atom gains or loses electrons?