Final answer:
Details in a speech should be relevant to the main idea or theme, and descriptive details can be effective but should be used sparingly.
Step-by-step explanation:
Details in a speech should be relevant to the main idea or theme. The details you include in a speech should support and enhance the main idea or theme of your speech. This helps to keep your speech focused and coherent.
Details that are descriptive can be effective in a speech. Using descriptive details in your speech can help to engage your audience and make your speech more vivid and memorable.
Details that are descriptive should be used sparingly. While descriptive details can be effective, it's important not to overwhelm your audience with too many details. Use them selectively to make an impact.