What does the motion of particles in the sun's plasma compare to the motion of particles in a solid?

Particles in both the plasma and a solid move around to fill available space.

Particles in the plasma move randomly, but particles in a solid vibrate in one place.

Particles in the plasma have low kinetic energy, but particles in a solid have high kinetic energy.

Particles in both the plasma and a solid are made up of fast-moving electrons and cations