Final answer:
Every multimedia presentation does not necessarily require a special effect; it depends on the presentation's purpose and the message. Special effects should be used when they enhance understanding and engagement without distracting from the content. Visual aids like charts and graphs can be very effective when used appropriately.
Step-by-step explanation:
Whether every multimedia presentation should include at least one special effect is largely subjective. However, it is not necessary for all presentations to have special effects. In the context of creating effective multimedia presentations, it's important to consider the purpose of the presentation and the message that needs to be conveyed. Script writing and presentations can benefit from multimedia elements such as videos, images, infographics, and animations only when they serve to enhance understanding, engagement, and the overall communication of the speaker's purpose and message. Overuse of special effects can sometimes be distracting or detract from the content. Therefore, the use of special effects or other multimedia elements should align with and support the content and goals of the presentation. When used appropriately, visual aids like figures, charts, graphs, photographs, and audio or video clips can significantly reinforce the presentation's content and improve audience comprehension.