Which of the following best defines non-verbal communication?

Non-verbal communication is best defined by the use of gestures and facial expressions. This form of communication encompasses a wide range of behaviors that convey messages without spoken or written words. Non-verbal cues are crucial because they can enhance or contradict what is being said verbally. For instance, a person's tone of voice, posture, eye contact, and hand movements can all convey meanings that accompany or even replace verbal expression.

Using gestures and facial expressions can communicate feelings like happiness, sadness, anger, or confusion, providing important context to the message. This is particularly significant in situations where words alone might not fully express a person's intent or emotion. Such non-verbal signals are universal in many respects and can facilitate understanding across different cultures.

In contrast, writing emails and reports focuses primarily on verbal communication through written language, speaking in a loud voice involves only verbal delivery without non-verbal elements, and using technical jargon exclusively doesn't contribute to non-verbal communication at all, as it relies solely on specific terminology to convey information.