Hint: Sound is a type of wave that travels through a medium, such as air, water, or solids, by vibrating particles in that medium.

Sound is a type of wave that travels through a medium, such as air, water, or solids, by vibrating particles in that medium.

Specifically, sound is classified as a longitudinal wave, meaning that the particles in the medium vibrate parallel to the direction of the wave's travel.

In a longitudinal wave, areas of compression (where particles are close together) and rarefaction (where particles are spread apart) move through the medium, carrying the sound energy. This is different from transverse waves, like those on a string or in water, where particles move perpendicular to the wave's direction. Understanding the nature of sound waves is fundamental in fields like acoustics and audio engineering.