What is this an Attractive forces between particles in a sample of matter are strong and pull the particles close together keeping them in fixed positions an example of?

This description exemplifies a solid state of matter, where attractive forces between particles are strong enough to maintain a fixed arrangement. In solids, particles are tightly packed and vibrate in place, resulting in a definite shape and volume. This is in contrast to liquids and gases, where particles are less tightly bound and can move more freely.