Which of the following is a type of non-verbal communication?

Non-verbal communication encompasses the ways in which feelings and messages can be conveyed without the use of spoken or written words. Facial expressions are a fundamental aspect of non-verbal communication as they can express a wide range of emotions and attitudes without any verbal interaction. For example, a smile can indicate happiness, while a furrowed brow may suggest concern or confusion.

In contrast, speaking, yelling, and oral reports all involve the use of words and vocal tones, categorizing them as forms of verbal communication. Verbal communication often includes the structure and intentionality of language, while non-verbal communication relies on physical cues and body language that may accompany or even contrast with spoken words. Therefore, facial expressions serve as a key example of how emotions and intentions can be communicated effectively without direct verbal exchanges.