Which speaking technique refers to the use of vocal elements to convey meaning and sustain interest?

The technique that involves the use of vocal elements to convey meaning and sustain interest is primarily termed as "voice." This encompasses various aspects, such as tone, pitch, volume, speed, and rhythm, each of which plays a crucial role in how a message is received by an audience. By varying these vocal elements, an instructor can add emphasis to important points, express emotions, and maintain engagement throughout the presentation. For example, a change in tone can convey urgency or excitement, while a deliberate pace can help audiences absorb complex information.

In contrast, diction refers specifically to word choice and clarity in speech, which is important for effective communication but does not encompass vocal dynamics. Proximity pertains to physical distance between the speaker and audience, influencing connection and engagement but not the vocal elements directly. Delivery encompasses a broader range of presentation skills, including body language and use of visual aids, in addition to vocal techniques, but does not specifically focus solely on voice as a means to convey meaning. Thus, "voice" is the correct term for the vocal elements crucial for sustaining interest in a presentation.