Answer:
Protest art is the creative works produced by activists and social movements. ... Social movements produce such works as the signs, banners, posters, and other printed materials used to convey a particular cause or message. Often, such art is used as part of demonstrations or acts of civil disobedience.
African Americans expressed their feelings through posters and banners.
Explanation:
The main purpose of Luther's speech was to persuade the audience to work towards ending the racial discrimination. Additionally, it inspired and brought hope to the people that one day discrimination can be abolished.
