Final answer:
The essential pillars for creating a successful presentation are design, audience, and purpose. Topic is not one of the essential pillars to focus on. Understanding the audience and aligning the presentation with their demographics and expectations is crucial.
Step-by-step explanation:
The item that is not one of the three essential pillars to focus on for a successful presentation is d. Topic. The three primary pillars Demetri should focus on include design, the audience, and the purpose of the presentation. When planning, it's vital to cross out topics that are not relevant to the audience as the aim is to make the presentation resonant for a public forum.
Understanding the audience's demographics, such as age, gender, education, and culture, is crucial as it influences the design of the presentation and how to approach the audience. Whether the audience is there voluntarily or because of an external force can dictate how much effort needs to be put into building common ground. Creating a mock-up or an outline considering the audience and purpose can serve as a prototype to guide the organization of the presentation. The proposal should demonstrate a clear understanding of purpose and show awareness of the audience and contextual expectations for it to be deemed successful and engaging.