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

Nodding is an example of non-verbal communication because it conveys information or feelings without the use of words. Non-verbal communication encompasses various forms of expression, such as gestures, facial expressions, body language, and posture. Nodding often signifies agreement, affirmation, or understanding, making it a clear representation of non-verbal cues that can enhance or complement verbal messages.

The other options involve verbal elements. Speaking refers to the use of spoken words to convey messages. Writing involves the written form of communication, while reading is the process of interpreting written words. Each of these relies on verbal language as a means of expression, distinguishing them from the non-verbal nature of nodding.