Which term describes the variation in audience size during communication?

The term that best describes the variation in audience size during communication is "scope." In the context of communication, scope refers to the range or extent of the audience being addressed. This can include variations in not only the size of the audience but also the diversity of the audience's backgrounds, interests, and levels of understanding on the topic discussed.

Understanding scope is crucial for effective communication because it influences how messages are tailored; for instance, a communication aimed at a large and varied audience may need to be more general and accessible compared to a communication directed toward a smaller, specialized group. By recognizing the scope, communicators can adjust their language, tone, and content to better engage their listeners, ensuring the message is both clear and impactful.

Internal communications, depth, and body language do not specifically address the concept of audience size variation. Internal communications refers to the flow of information within an organization, depth relates to the detail and thoroughness in communication, while body language pertains to non-verbal cues used in communication. Hence, these terms do not capture the essence of audience variation in the same way that scope does.