Answer:
Quote: “This sweltering summer of the Negro’s legitimate discontent will not pass until there is an invigorating autumn of freedom and equality.”
Metaphor: King compares the legitimate anger of African-Americans to sweltering summer heat and freedom and equality to invigorating autumn. Right at the start of the speech, MLK makes an allusion, or reference to history, recalling the Emancipation Proclamation (2.1). In historical texts as well as literature, specific references to other texts or events can help place the document in a larger context.“Five score years ago…” refers to Lincoln’s famous Gettysburg Address speech which began “Four score and seven years ago…” This allusion is particularly poignant given that King was speaking in front of the Lincoln Memorial.
Step-by-step explanation: