Answer: The correct answer is "solid state".
Explanation:
Kinetic energy is due to the motion of the particles.
The states of matter are: Solid, liquid and gas.
Solid: The particles of the solid are more tightly packed. Their particles can not move freely. They are tightly packed. They are rigid. Their particles have least kinetic energy.
Liquid: The particles are more loosely packed as compared to the solid. Liquid is a fluid. The particles of the liquid can move but their particles has less kinetic energy.
Gas: The particles are loosely packed. In this state, the particles can move more freely. Gas is a fluid. The particles of the gas has more kinetic energy as there is enough space between the particles.
Therefore, solid state of matter has the least kinetic energy.
