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

Q: Poles parts of the planet does solar energy have difficulty reaching.

A: What parts of the planet does solar energy have difficulty reaching?
****
Q: Resonance is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule.

A: What is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule?
****
Q: Mandible controls the opening to the airway and gut.

A:
What controls the opening to the airway and gut?
****