If a star's outer shell has low ionization, why is the entire body still considered plasma?

Answer

The presence of free charge carriers means the material still exhibits plasma characteristics like electrical conductivity.

Even if ionization is only partial, the existence of free charge carriers allows the material to exhibit plasma characteristics, such as electrical conductivity, meaning the entire structure functions as a plasma environment.

If a star's outer shell has low ionization, why is the entire body still considered plasma?
astronomycompositionstarmatterplasma