Question

write one example in nature in which nuclear energy is produced by nuclar fusion

Answer 1

Sun is one of the example.

Answer 2

The example of nuclear fusion is shown in figure below: Here two isotopes of hydrogen (tritium and deuterium) are fused together, under high pressure and temperature, to form a more stable atom of helium. Thefusion process also results in release of a neutron and hence in turn releases a large amount of energy.