Answer:
The paragraph discusses and explains the different elements of a message, including nonverbal communication, tone, and verbal communication. Therefore, the correct answer is:
lists and discusses elements of a message.
Step-by-step explanation:
The paragraph explains Dr. Albert Merabian's research on interpersonal communication, which found that a message is composed of three main components: nonverbal communication, tone, and verbal communication. The paragraph goes on to describe the importance of each component and how they contribute to the overall message. By doing so, the paragraph provides an in-depth discussion of the elements of a message and how they impact communication. Therefore, the correct answer is that the paragraph lists and discusses elements of a message.