sal attention D. state the purpose What function of introduction is used when a speaker shows the a that he is reliable and trustworthy to discuss the topic? A. establish credibility C. preview main idea B. gain audience attention D. state the purpose of the . What term denotes the smooth transition of one sentence to anothe paragraph to another? A. duration C. logical organization B. grammatical correctness D. word choice . Which part of the speech provides summary of the main points of the speech? A. body C. introduction B. conclusion D. thesis statement 6. Which part of the speech reveals the goal of the speech? A. body C. introduction B. conclusion D. thesis statement