Connotations are the emotions that we associate with a given word. While most of the time, these are fixed (i.e. some words arouse pleasure while others contempt), they can be subjective. (i.e. for someone who is afraid of dogs, the word dog can imply danger, whereas for someone who loves dogs, the word can be a source of comfort and pleasure).
1)to celebrate an important milestone in the history of civil rights. 3) to inspire and motivate bis audience to exercise their right to vote. 4)to inform and educate his audience about the history of social injustice in America