Question

which depicts the arrangement of particles in matter as the temperature is increased at constant pressure?

Explanation:

As temperature increases at constant pressure, matter transitions from solid to liquid to gas. In a solid, particles are closely - packed and have fixed positions. In a liquid, particles are more spread out and can move past each other. In a gas, particles are widely spaced and move freely. Option A shows a transition from a more ordered (solid - like) arrangement to a less ordered (liquid - like) and then to a very disordered (gas - like) arrangement as temperature increases.

Answer:

A.