Question

what causes a disturbance that results in a wave?

Explanation:

A wave is a disturbance that travels through a medium. The cause of this disturbance is a vibration. When an object vibrates, it transfers energy to the surrounding medium (such as air, water, or a solid). This energy transfer creates a wave. For example, when you pluck a guitar string (vibration), it causes the air molecules around it to vibrate, creating sound waves.

Answer:

Vibration