Answer:
Dr. Martin Luther King, Jr. used the metaphor of "cashing a check" in his "I Have a Dream" speech. The use of this metaphor helped to make his speech more effective in its persuasion to change.
Step-by-step explanation:
Both the Declaration of Independence and the American Constitution made great promises. These promises had been signed by the founders of this country. In essence, their signatures made those documents into promissory notes, or "checks," written to all the people of America. No one was left out; none were eliminated based on race, origin, sex, religion, age, or any other distinguishing characteristics. Unfortunately, African Americans were written "bad checks." They did not receive the respect, rights, and privileges that had been promised to them. This metaphor made King's speech more effective because it provided all those who heard or read it with a fresh perspective on an ancient problem. New perspective can often persuade people to reconsider and change their opinions and attitudes.