The potential energy of a body changes with the change in____

The correct answer is: Mass

Potential energy is the energy stored in an object. It depends on the mass of the body.
PE = mgh
Where, PE= potential energy, m=mass of an object, g= gravitation acceleration (It is a constant unit), and h= height at which the object is placed.
considering the height remains the same,
PE  m
Thus, potential energy is directly proportional to the mass of an object.
Hence, if the mass changes the potential energy also changes.