Answer: 1. nonverbal communication.
Messages can mostly be transmitted in three main forms: verbally, through writing, and in a non-verbal manner. Non-verbal communication may involve sending out messages with the use of body gestures without actually using your mouth to say anything. Relevant information is sometimes passed through facial expressions, eye contact, body language, and even posture. It requires the understanding of non-verbal cues to be able to determine the information being passed.