Final answer:
Gravitational potential energy is the correct answer which refers to energy stored due to an object's position in a gravitational field. It is one of several forms of potential energy.
Step-by-step explanation:
The correct answer to fill in the blank is 'Gravitational potential' energy. This type of energy is stored due to the position of an object, typically in a gravitational field. For example, a brick lying on a windowsill or a roller coaster car at the top of a hill both possess gravitational potential energy because they have the potential to fall under the influence of gravity, which would convert their potential energy into kinetic energy.
Gravitational potential energy is just one form of potential energy. Other forms include chemical potential energy, which is stored in chemical bonds, and electrical potential energy, which is based on the position of charged particles.