What makes stars produce energy?
O gravity
O hydrogen
O nuclear fusion
O nuclear fission

Fission produces energy by breaking up massive nuclei like uranium into less massive nuclei like helium and lead. Fusion produces energy by fusing together light nuclei like hydrogen to make more massive muclei like helium. Atomic power plants and the Atom Bomb use fission to get the energy.

3.1439 im dont think its right but im pretty sure it is