As an object rolls downhill, some of the energy is
potential
chemical
kinetic and some is potential
kinetic

When the object is at the top of the hill it has the most potential energy. If it is sitting still, it has no kinetic energy. As the object begins to roll down the hill, it loses potential energy, but gains kinetic energy. The potential energy of the position of the object at the top of the hill is getting converted into kinetic energy. Hope this helped. :)

Well this is kind of a trick question. When the object is still before it rolls downhill it is potential. But as the object is rolling down the hill, it is kinetic energy. So, I believe your answer would be kinetic since it doesn't specify everything that's happening.