Final answer:
Nuclear power plants use fission, atomic bombs use fission, the sun and H-bombs use fusion.
Step-by-step explanation:
In the context of nuclear power plants, fission is the process involved. Nuclear power plants generate electricity by splitting the nuclei of heavy atoms, such as uranium or plutonium, in a process called nuclear fission. This releases a large amount of energy in the form of heat, which is then used to produce steam and turn turbines to generate electricity.
Atomic bombs also utilize nuclear fission. These weapons work by triggering a chain reaction in which the nuclei of atoms are split, releasing a tremendous amount of energy in the form of an explosion.
The production of energy in the sun and H-bombs involves nuclear fusion. In nuclear fusion, light atomic nuclei, such as hydrogen, combine to form heavier nuclei, releasing an enormous amount of energy. The sun and H-bombs use this process to produce energy.