Question

the root phon means sound. what does the word headphones mean? a device you put on your ears that lets you listen to sounds or music a device you put on your head to keep it protected when you ride a bicycle a device you put on your eyes that lets you see things more clearly

Explanation:

Given that "phon" means sound, "head - phones" likely refers to a device for the head related to sound. The first option describes a sound - related device for the ears, which is consistent with the root meaning. The second option is about a protective head - device for cycling (helmet - like), and the third option is about an eye - device (glasses - like).

Answer:

a device you put on your ears that lets you listen to sounds or music