Answer the following question given this paragraph: 

Most musical instruments use resonance to amplify the sound waves and make the sounds louder. Resonance occurs when an object vibrates in response to sound waves of a certain frequency. In a musical instrument such as a guitar, the whole instrument and the air inside it may vibrate when a single string is plucked. This causes constructive interference with the sound waves, which increases their amplitude.


Q: What happens do the sound during a resonance?

 Choices:

- it becomes quieter

- it dissipates

- it echoes

- amplified, it becomes louder

A:
amplified, it becomes louder
