Why does martin Luther king use imagery in his speech you have a dream?

Martin Luther King Jr. uses imagery in his "I Have a Dream" speech to create vivid mental pictures that evoke strong emotions and inspire hope. By painting a vision of a racially harmonious future, he helps listeners connect with his message on a deeper level. This powerful use of imagery not only emphasizes the urgency of civil rights but also motivates his audience to envision and pursue a better, more just society.