Here's why:
* Solid Structure: Particles in a solid are tightly packed together in a fixed, rigid structure. This strong attraction between particles keeps them in a specific arrangement.
* Vibration: While they can't move freely, the particles in a solid still possess kinetic energy. They vibrate and jiggle around their fixed positions. The amount of vibration increases with temperature.
Think of it like this: Imagine a group of people standing close together, each holding onto the others' hands. They can't move far away from each other, but they can still shake their hands and move around a little within that fixed structure.
