Answer;
A.the atmosphere of stars
Step-by-step explanation;
A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons.
The characteristics of plasmas are significantly different from those of ordinary neutral gases so that plasmas are considered a distinct "fourth state of matter.
The plasma is acted upon by electric and magnetic fields created within the plasma itself through localized charge concentrations and electric currents that result from the differential motion of the ions and electrons.