Which of the following is an example of nonverbal communication? shaking hands to greet a supervisor writing an email to a coworker talking on the telephone to a customer listening to a presentation at a meeting

"shaking hands to greet a supervisor" is an example of non-verbal communication because you are using your actions and not your words to communicate.

Shaking hands to greet a supervisor

Explanation:

Non-verbal communication is the communication that is based on expression of face,touch , body language, movement ,gestures etc .It does not include verbal terms for conveying message. Shaking hands with supervisor for greeting him is form of non-verbal communication as this gesture is describing about addressing or welcoming supervisor through shaking hands .Other options are incorrect because talking on phone is verbal communication. Listening in presentation depicts about listening activity .Emailing any co-worker is conveying message through text and characters that does not include gesture or expression for sending message.Thus, the correct option is shaking hands with supervisor.