In this stage the star is just a bunch of gas and dust being combined to form the star
in the protostar stage, it is a very young star and the mass is still collecting to form a star. this is one of the earliest phases.
now i have moved to the protostar stage
this is the high mass main sequence star stage, it is the opposite of a low mass main sequence star which creates a red giant during it if it were to be a low mass star. Also, nuclear fusion happens right before this stage but you cannot see it
we have already went through the nuclear fusion stage and now we are in the main sequence star stage!
this is the supergiant stage, which are the most massive and luminous stars They are in the upper region of the Hertzsprung-Russel diagram
i am now in the super giant stage!!!
this stage is the near end, white dwarfs and black dwarfs happen around this time which for a planetary nebula. But in this stage is a powerful explosion.
i am officially coming to the end, we are ihe supernova stage
this is the final stage which is a black hole. Sometimes it is a neutron star but it depends on whether the core survives or not.