Answer & Explanation: Sattire involves the use of humour and irony to expose and criticize the vices of the society.
In this excerpt, Mark Twain paints a clear picture of peer pressure informing the society how young people are ridiculed for doing the right thing. Obviously, the young boy here should not be chewing tobacco but he gets laughed at which is suggestive of him doing the wrong it. Eventually he decides to do the wrong thing and he is seen as characterless.
This is typical of the society we find ourselves. We fail to realise the effect of peer pressure amongst youth. Youths are being destroyed and we dont look at the root cause of their action.
"b. Ben Bernanke became chairman of the federal reserve in 2006" is the only factual sentence from the options listed. The others are opinions or haven't happened yet.
Falling of the leaves off Ivy vine describes the hopelessness of Johnsy to live and she thinks that she will also die after the last leaf falls off.
<u>Explanation:</u>
Ivy vine is a symbol of the determination that Sue has in her. It is the determination to keep Johnsy alive who has lost his hope and will to live and thinks that she will die when the last leaf falls of the vine.
Bit even the last leaf falls, Johnsy is lying on her bed and is alive after which Sue tells Johnsy that she is not going to die. Now Johnsy also has the will to live and do something in her life like she wants to paint and live happily in her life.