A student takes notes in class. Sound Waves I. Created by a vibration A. Vibration: something that causes air molecules to move back and forth quickly and steadily II. Move through a medium A. Solid B. Liquid C. Gas Which line of her notes contains an error

I A

Explanation:

Vibration can simply be explained as the the action of moving back and forth quickly and steadily. And , It should be understood that sound wave is produced when an object vibrates.

It should be noted also that sound waves travel through solid, liquid and air or gas.

Therefore, it means that sound waves are not created by vibration but created or produced only when something is caused to vibrates.  

answer; english speaking;