Which of the following speaking types emphasizes spontaneity?

Extemporaneous speeches emphasize spontaneity because they are delivered with little prior preparation and are based on a general outline or key points. This format allows the speaker to engage more naturally with the audience, adapting their message in real-time depending on the audience's reactions or the flow of the conversation. This approach encourages a more interactive and dynamic presentation, as the speaker relies on their knowledge and ability to think on their feet.

In contrast, manuscript speeches involve reading a speech verbatim from a written document, which limits spontaneity due to the rigid structure and reliance on the text. Prepared speeches are carefully crafted in advance and rehearsed, which again reduces the element of spontaneity as the speaker follows a predetermined script. Memorized speeches, while allowing for natural delivery, hinge on the speaker recalling a pre-written text without the flexibility to adjust to audience feedback in the moment. Thus, extemporaneous speeches are uniquely positioned to highlight spontaneity and the speaker's adaptability.