Answer: Nuclear fusion and Nuclear fission
Step-by-step explanation: Nuclear fusion is a process which involves the conversion of two small nuclei to form a heavy nuclei along with release of energy.
Nuclear fission is a process which involves the conversion of a heavier nuclei into two or more small and stable nuclei along with the release of energy.
The binding energy which is the energy which keeps the neutrons and protons intact in the nucleus is being released during nuclear reactions.