Which statement is the best example of one of the themes of to build a fire

Answer this correctly what is the cause and effect

In paragraph 5, president obama remarks: “you know, when trayvon martin was first shot i said that this could have been my son. another way of saying that is trayvon martin could have been me 35 years ago.” how does president obama use rhetoric in this quote to contribute to the overall meaning of his speech?

Why does the author most likely emphasize the size of new york city ?