1. Sun releases energy by the process of A. nuclear fusion B. nuclear disintegrationC. nuclear fissionD. spontaneous combustion

Hello Student
Sun releases energy by the process of nuclear fusion. Nuclear fusion reaction in the sun follows the proton-proton cycle. Two hydrogen first react and produce Deuterium with emission of a positron and electron antineutrino. Proton consists of uud quarks and due to the reaction one of it transforms to udd that is a neutron. Weak force does the change in the quark flavours