Final answer:
Plasma is a state of matter consisting of freely moving ions and electrons, distinct from gases due to ionization, and commonly found in stars and lightning.
Step-by-step explanation:
The correct answer to describe the plasma state in terms of particles is option b) Plasma consists of ions and free electrons not bound to atoms. Unlike solids with particles in a fixed arrangement or liquids with a definite volume, plasma has neither definite shape nor volume. Its particles are far apart like gases, but a significant difference is the presence of ionized particles, meaning electrons have been separated from the atomic nucleus. This ionization gives plasmas their unique properties and makes them distinct from gases. Plasmas are found in high-temperature environments, such as the interior of stars, lightning bolts, and in certain technological applications like fluorescent bulbs and plasma screens.