What Once a star is fully formed it becomes which type of star?

Once a star is fully formed, it typically becomes a main sequence star, where it spends the majority of its life fusing hydrogen into helium in its core. The duration a star remains in this phase depends on its mass; larger stars have shorter lifespans, while smaller stars, like red dwarfs, can stay in this stage for billions of years. Eventually, when the hydrogen in the core is depleted, the star will evolve into a red giant or supergiant, depending on its mass.