Identify the initial source of energy for all life on earth

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

Processes above and be sure to mention the movement of electrons and energy as the carbon atom moves from one reaction to another.