Final answer:
An effective speech should be organized around main points supported by an outline and various supporting materials, such as evidence and audiovisual aids.
Step-by-step explanation:
An effective speech should be organized around main points. These serve as the pillars upon which the entire talk is constructed, providing both structure and direction. The outline of the speech acts as a framework to organize major claims, reasoning, supporting details, and evidence. This ensures a logical flow and helps to engage the audience effectively. During the body of the speech, each main point should be backed by sub-points and supporting material including reasoning, examples, evidence, and if necessary, audiovisual support. Appropriate transitions and signpost language guide the audience through the structure of the presentation, helping them to follow the speaker's progression of ideas.
Additionally, while preparing an effective speech, presenters should consider the organization of ideas, ensuring background details and supporting evidence establish coherence and completeness. Using media and visual aids can be beneficial in clarifying abstract ideas and enhancing the speech's impact, provided they are used appropriately and support the message rather than detracting from it.