A speech that involves background preparation, idea organization, brief notes, and a conversational delivery would be described as which of the following?

A speech that involves background preparation, organized ideas, brief notes, and a conversational delivery is best characterized as extemporaneous. Extemporaneous speaking requires the speaker to prepare their content ahead of time, allowing for thorough knowledge of the topic. This preparation aids in organizing the main points and supporting information, which can then be delivered from brief notes rather than a fully written script.

The conversational delivery style is a hallmark of extemporaneous speaking, as it allows for a more engaging connection with the audience, fostering a more natural interaction. This contrasts with other styles, such as memorized speeches, which can sound rigid and rehearsed, or manuscript speeches, which rely on reading directly from a script, limiting engagement. Impromptu speeches, however, typically occur without prior preparation, leading to a different level of organization and thought continuity than extemporaneous speaking.