What elements contribute to the tone of every speech? A. word choice and delivery B. images and words C. optimism and inspiration D. reason and emotion

The two elements that contribute to the tone of every speech are (D) reason and emotion. Whatever emotion you feel in the speech, should also be felt by the audience. So if your speech is serious, your audience should be serious. A consistent tone allows the audience to focus and for the speaker to effectively get their point across.