Final answer:
The solid phase has the greatest force of attraction between particles because of their close contact and strong intermolecular forces, making the solid phase the most tightly packed state of matter.
Step-by-step explanation:
The phase of matter that contains the greatest force of attraction between particles is the solid phase. Atoms in solids are in close contact, leading to strong intermolecular forces (IMFs) that allow the particles to vibrate but not change position with neighboring particles. This is similar to springs that are stretched or compressed but not broken. The solid phase has a defined shape and structure because of these forces. When energy, typically in the form of heat, is added to a substance, the kinetic energy of the particles increases. If enough energy is present, the particles can overcome some intermolecular forces, leading to a phase change to liquid, where particles are still held together but can move past one another, and eventually to gas, where they separate completely.