The answer is the readers Senses. Because it helps us better imagine the settings as if we were there.
"The man who was almost a man" speaks of Dave, who had conflicts with gaining recognition and respect, because he was young. He wanted to grow up and become a man. For this he bought a weapon, thinking that it would make him grow as a man. Seeking power, he buys this weapon, to feel powerful, unstoppable. All these conflicts of the dave age led him to make some bad decisions. The story well specifies this when he accidentally shoots a mule, and he cannot sustain the excuse he made up for it, and when he decides to take a train and go to a city where he would be able to man up.
Answer:
B. Facts from documentary about medical and artificial hearts ( not sure )
