Whats different and whats similar
Tone is the author's attitude toward the speech. Since we know that Dr. King was the author and presenter of the speech, this was one of inspiration, seriousness, hope, and encouraging. This is not to be confused with mood. Mood is your feelings from the text. So, while the tone may be one of hope, to say it was 'hopeful' would be a mood (if that is indeed what you are feeling when hearing it.)
"Harrison Bergeron" takes place in 2081, in the United States, and it's main point is the society depicted, that restrained critical thinking and creativity, as well as competition; in a distorted application of methods to achieve equality. They used devices to avoid clear thinking, masks to hide beauty with the purpose of placing people in the same level.
The characters are the Bergeron family in which the son, Harrison Bergeron, was so superior that no "containment" device could avoid his skills and appearance to show up. In a tentative of changing the world and freeing the handicapped people, and after all that being their "King", Harrison defies the system and ends up being murdered by the commander of this new world: The United States Handicapper General. As no one could remember what happened on the moment before, even Harrison's parents who were watching the scene on TV, the world continued as it were.
<span>A. It compares the emptiness of life with the arrival of springtime to underscore the contrast between the two.
I hope this is right.
Good luck! :)</span>