The Reorganization of Two Protons Into Helium

The reorganization of two protons into helium has less energy than just the two protons by themselves. To get into that state, you have to release energy. Just like how an electron moves down an energy level around an atom, it has to give up a photon to move down anEnergy is conserved there. Forces like to push things towards lower potential energy. The way gravity pulls a rock down a hill to lower gravitational potential energy.