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

[Q]: Lying with their mouths open, a behavior called gaping, probably serves the function of cooling down for crocodiles.
[A]: Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles?

[Q]: When an atom gains or loses an electron it becames a(n) ion.
[A]: When an atom gains or loses an electron it becames an?

[Q]: A solution forms when a solute dissolves in a solvent.
[A]:
What forms when a solute dissolves in a solvent?