A fully formed star doesn't necessarily become a specific type. Stars can be classified into different types based on their temperature, size, luminosity, and composition, and a star's final type depends on its initial mass.

Here's a breakdown:

Main Sequence Stars:

* This is where most stars spend the majority of their lives, including our Sun.

* They are fusing hydrogen into helium in their cores, generating energy.

* The specific type of main sequence star (O, B, A, F, G, K, M) depends on the star's mass and temperature.

Post-Main Sequence:

* After exhausting their hydrogen fuel, stars evolve into different stages depending on their mass:

* Low-mass stars (like our Sun): Become red giants, then planetary nebulae, and eventually white dwarfs.

* Medium-mass stars: Become red giants, then supernovae, and leave behind neutron stars or black holes.

* High-mass stars: Directly become supernovae, leaving behind neutron stars or black holes.

So, there's no single "type" a fully formed star becomes. It depends on its initial mass and the evolutionary path it takes.