Final answer:
Solids have the least potential energy due to the tightly packed arrangement of particles.
Step-by-step explanation:
Solids have the least potential energy. Potential energy is directly related to the arrangement of particles in a substance. In solids, the particles are tightly packed and have less freedom of movement, resulting in lower potential energy. Liquids have more potential energy as the particles are more disordered, and gases have the highest potential energy as they have the most freedom of movement.
Learn more about Potential energy in solids, liquids, and gases