Which of the following is an example of non-verbal sexual harassment?

Non-verbal sexual harassment includes behaviors that do not involve spoken or written communication but still convey inappropriate or unwanted sexual advances or messages. Unwanted gestures and leering fall squarely into this category because they are physical actions or expressions that can create a hostile or uncomfortable environment for the recipient. Such behaviors can be particularly distressing as they often carry a clear sexual connotation without any words being exchanged, making it a significant form of harassment.

In contrast, the other examples mentioned involve verbal or written forms of communication. Inappropriate email communication and sending explicit text messages are clearly verbal forms, as they involve written words to convey a message, while making derogatory comments also relies on spoken or written language rather than non-verbal cues. Thus, the choice highlighting unwanted gestures and leering accurately represents non-verbal sexual harassment and is indeed the appropriate answer to the question.