Which of the following is an example of non-verbal communication?

Non-verbal communication encompasses the various ways in which we convey information or express feelings without using words. Facial expressions serve as a prime example of this type of communication, as they can indicate a person's emotional state or reaction to a particular situation without any verbal context. For instance, a smile can denote happiness or approval, while a frown might express discontent or confusion.

In contrast, written reports, emails, and presentations rely on verbal or written language to communicate ideas, information, or messages. These forms are explicit in their use of words and language structures, which differentiates them from the implicit, more instinctive nature of non-verbal communication like facial expressions. Thus, the selection of facial expressions highlights the significance of non-verbal cues in conveying emotions and reactions in interpersonal interactions.