CONCEPT:Potential energy: The energy stored in an object because of its specific shape or position.The potential energy possessed by a body due to its height is called gravitational potential energy. The gravitational potential energy can be calculated as,P.E. = mghThe potential energy stored in a body due to a change in its shape is called elastic potential energy.??Kinetic energy: The energy an object has because of its motion.K. E. = (½) mv2Nuclear Energy: A huge amount of heat is produced in a very short time when the nuclei of some elements like uranium, thorium, etc. undergo fission. This is used in atomic energy projects.So, the correct answer is option 1.EXPLANATION: Referring to the definition of potential energy we can say that the energy possessed by a body due to its change in position or shape is called potential energy.So, the correct answer is option 2.