Potential energy because it has the ability to do work
Explanation:
Kinetic energy is when an object is doing work, and potential energy is when an object has the potential to get kinetic energy either due to it's position or molecular composition. In this case since the rock is resting high on a cliff, it has a bunch of potential energy, due to it's position, because gravity. If it were to fall of the cliff, it would then convert that potential energy to kinetic energy, but at that moment, since it's resting, it's only potential energy, because it has the potential to convert into kinetic energy. So the correct answer is: Potential energy because it has the ability to do work
