Answer:
The mass of the object and its height in the gravitational field of the Earth.
Step-by-step explanation:
If we are talking about gravitational potential energy which is defined as:
being "m" the object's mass, "g" the acceleration due to gravity, and "h" the height at which the object is located relative to the conventionally picked level for zero of potential energy.
As long as the value of "g" is constant, the only two variables that determine the gravitational potential energy are the mass (m) of the object and its relative height (h).