Question

sound waves are produced when something is caused to reflect. vibrate. slow down. get warmer.

Explanation:

Sound waves are mechanical waves. They are generated when an object vibrates. When an object vibrates, it causes the surrounding medium (such as air) to also vibrate. These vibrations propagate as sound waves. Reflection is related to how sound waves bounce off surfaces, slowing down is about the speed of sound in different media (not the cause of sound wave production), and getting warmer is related to thermal energy (not the production of sound waves).

Answer:

vibrate.