answer: historical reachers use scrap books, speeches, journals, letters and diaries, photograges, audio recordings, video recordings, films, archives and manuscript material, published books, newspapers and magazine clippings published at the time.
Example: Speeches: mlk’s speech. Newspaper: news in the newspaper about Rosa parks. (Thats only two but you see where I’m going)
<span>I think the answer is bebop or bop. This is also known as rebop. This genre is often used by many African Americans during the Swing Era. It is composed with the main theme and the head theme. It is also layered with extended solos to make the music more dynamic. In this way, it would add more flavor to head theme. Bebop music had evolve thru time and continues to improvise.</span>