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

Non-verbal communication encompasses the ways in which individuals convey messages without the use of spoken or written words. Facial expressions are a significant component of non-verbal communication as they communicate emotions, attitudes, and reactions. For instance, a smile can indicate happiness or friendliness, while a frown may convey disapproval or concern.

Understanding facial expressions is crucial because they can reinforce, contradict, or complement verbal communication. They play a vital role in interpersonal interactions and can often convey nuanced feelings that words alone may fail to express.

In contrast, written words, auditory signals, and spoken language all rely on verbal forms of communication, making them distinct from non-verbal methods. Therefore, facial expressions are the correct choice as they represent a fundamental aspect of non-verbal communication.