which is another use for themes in a speech?\na. providing additional detail\nb. adding structure\nc…

Brief Explanations:

Themes in a speech help organize the content. They act as a framework, giving the speech structure. Additional details are more about supporting points, imagery is for creating mental pictures, and extending a simple metaphor is a more specific literary - related action. The main non - obvious use among the options for themes is adding structure.

Answer:

B. Adding structure