Which of the following is an example of nonverbal communication?

Nonverbal communication refers to the ways in which we convey messages without using words. This includes body language, facial expressions, gestures, posture, and visual cues, among others. Nodding your head is a clear example of nonverbal communication because it conveys agreement or understanding without the use of spoken language.

In contrast, writing an email involves linguistic and textual elements, making it a form of verbal communication. Making a phone call primarily relies on verbal communication, as it requires spoken language to convey messages. Reading a book also involves interpreting written language and is therefore classified as a verbal activity. Thus, nodding your head stands out as the best example of nonverbal communication because it engages physical gestures to express meaning.