Answer:
So the theme will be more memorable because the audience heard it last
Step-by-step explanation:
A theme is an idea or message that unifies a written work such as a speech. In that respect, in a speech the theme is also used as an organizational tool. Therefore, if the theme of a formal talk is referred to during the closure of the address, then it will maintain the audience's attention until the end of the speech. Finally, it will cause a deeper impact on public, and it will be more memorable as the last important message heard.