Concept:States of matter differ by particle spacing, movement, and kinetic energy.
Explanation:Gas particles are widely spaced from one another.
They move freely and randomly in all directions.
They have high kinetic energy because of rapid motion.
This description does not fit solids, which are tightly packed, or liquids, which are close but mobile.
Plasma is ionized gas, but the given clue best matches gas in normal states.
Answer:Option D. Gas.