How does sound travel?

Sound travels primarily through vibrations in a medium, such as air, water, or solid materials. When an object vibrates, it creates pressure waves in the surrounding medium. These pressure waves are what we perceive as sound. The correct answer highlights that sound is transmitted as waves that are created by these vibrations.

While it is true that sound can be described in terms of particle motion, this explanation is more about the underlying mechanisms of sound rather than the general way sound is perceived and experienced. Similarly, describing sound travel by direct contact between sources is misleading, as sound can propagate through a medium without requiring direct contact, allowing it to travel over distances even when the source and receiver are not touching. Thus, the description of sound traveling on waves captures the essence of how sound propagates in a clear and comprehensive manner, making it the most accurate choice.