Question

which process leads a star to glow and produce energy? nuclear fusion gravitational pull nuclear fission protostar development

Explanation:

Nuclear fusion is the process where light atomic nuclei combine to form heavier ones, releasing a large amount of energy. In stars like the Sun, hydrogen nuclei fuse to form helium, and this energy release is what makes stars glow. Gravitational pull is a force (not an energy - producing process in the sense of making a star glow). Nuclear fission is the splitting of heavy nuclei (used in nuclear power plants on Earth but not the main energy - producing process in stars). Protostar development is a stage in a star's formation, not the energy - producing process that makes it glow.

Answer:

nuclear fusion