Final answer:
The best model for how particles move in a liquid phase is one that shows them with the ability to move freely while remaining in close contact, which corresponds to having a definite volume but no definite shape.
Step-by-step explanation:
The best representation of how particles move when they are in a liquid phase is a model where the particles are shown to be close to one another but with enough space to move about while remaining in contact. This movement corresponds to a state of matter with definite volume but no definite shape, which is typical of liquids.
The freedom of movement for molecules increases from solid to liquid to gas phase due to the decreasing attractive forces between them.
Among the options provided, the model that best aligns with the description of particle movement in a liquid would be the one showing particles in close proximity that can still move around freely.
In relation to the provided reference information, statements that describe the liquid state include having a definite volume, no definite shape, and particles that can move about while staying in touch with each other.