How is theme used differently in a speech than in a written piece of work? a. themes in speeches are used to organize the speech to make it easier for the audience to understand. b. themes in speeches provide a large amount of detail so that audiences can gain a thorough understanding. c. themes in speeches refer to the main idea that the speaker wants the audience to take away. d. themes in speeches are general ideas or concepts that will be supported later with facts and source information.