What does a star produce from hydrogen?

A star primarily produces helium from hydrogen through the process of nuclear fusion. In this process, hydrogen nuclei (protons) collide and fuse under extreme temperature and pressure, creating helium nuclei while releasing a significant amount of energy in the form of light and heat. This energy is what powers the star and allows it to shine throughout its lifetime. As stars evolve, they can create heavier elements from helium and other lighter elements through further fusion processes.