As the mass increases, the potential energy_____

The correct answer is: Increases

Potential energy is the stored energy of an object placed at a certain height.
According to the formula,
Potential energy= mass x gravitational acceleration x height.
Considering the height of the object be constant,
Potential energy  mass
Thus, as the mass of the object change, the potential energy will also change according to it.
Hence, if the mass increases, the potential energy also increases.