Which of the following is NOT a type of speech delivery method?

The designation of visual as not being a type of speech delivery method is accurate. When discussing speech delivery methods, the focus is typically on the ways in which a speaker presents their content, which involves verbal and non-verbal components.

Extemporaneous delivery involves speaking with preparation and a structured outline, allowing for natural conversational flow while relying on key points rather than a full script. Impromptu delivery refers to speaking without prior preparation, often requiring quick thinking and adaptability to the topic at hand. Memorized speech delivery involves the complete rote recall of a speech, allowing for direct engagement with the audience without notes.

Visual, on the other hand, pertains to the use of visual aids like slides, charts, or images to enhance understanding or engagement, but it does not describe a method of verbal delivery itself. Therefore, identifying visual as not fitting within the categories of speech delivery methods is correct, as it focuses instead on supportive materials rather than the execution of the speech.