You are presented with the question "What use may some animals have for their vocal chords?" and the following answer choices: 
- support
 - chiming
 - exoskeleton
 - courtship
 - circulatory systems
 - reading music
 - writing
 - communication

Now knowing that sound can be used for communication by animals and sound occurs when a body, such as a vocal chord, vibrates, or moves back and forth, choose the best answer.


 

        communication 