Final answer:
When matter transitions from a solid to a liquid, the particles increase the distance between each other and start to slide past each other, allowing the material to take the shape of its container.
Step-by-step explanation:
When matter changes from a solid to a liquid, space between particles increases, and particles can then slide past each other. The correct answer to the provided MCQ is A) Space between particles increases, and particles can then slide past each other. In a solid, molecules or atoms are closely packed in a fixed position, vibrating but not changing locations. Upon heating, these particles gain energy and start moving more freely, slightly pushing apart from each other, which results in a liquid. This allows the particles to slide past one another, which gives liquids their ability to take the shape of their container while maintaining a definite volume.