The stellar process in which fusion of hydrogen produces other elements is called hydrogen burning. This is the first stage of stellar evolution in stars like our Sun.

Here's a breakdown of the process:

* Proton-proton chain: This is the dominant fusion reaction in stars like our Sun. It involves a series of steps where four hydrogen nuclei (protons) are converted into one helium nucleus (alpha particle), releasing energy in the process.

* CNO cycle: In hotter stars, a different fusion process called the CNO cycle is more important. It involves carbon, nitrogen, and oxygen as catalysts to fuse hydrogen into helium.

Both processes ultimately result in the production of helium from hydrogen. This is the fundamental process that fuels stars and powers their luminosity.