Which of the following is an example of self-presentation in communication?

Adopting a formal tone during a presentation is an example of self-presentation in communication because it involves consciously choosing how to convey oneself to an audience. This choice reflects an awareness of context and a desire to create a particular impression. In many formal settings, a professional tone can enhance credibility, formality, and respect towards the topic and the audience.

This approach demonstrates self-awareness and an understanding of the norms and expectations of communication in a formal environment, which is critical in effective interpersonal communication. It's about managing the perceptions of others by aligning the communication style with the expected conventions of the situation.

Other options illustrate different aspects of communication. For example, expressing personal opinions and supporting arguments with facts are more about content delivery rather than the style or manner in which one presents oneself. Responding to criticism with humor may reflect interpersonal skills and coping mechanisms but does not focus specifically on the aspect of self-presentation like adopting a formal tone does.