Explanation: Just to elaborate a little on the answer, it can be added that none of the other options are correct, since this poem has verses that rhyme and it has more than fourteen lines. This poem is a ballad, a narrative song that recounts a very tragic event — the death of four African American adolescents when their church in Birmingham, AL, was bombed on September 15, 1963. Apart from the narrative structure, it also features the characteristic repetition of lines, specifically the repetition of the line "And the choirs kept singing of Freedom."
Like the Phoenix, which rises from the ashes, they will rebuild their society from the destruction caused by the bombing and the damage caused by outlawing books.
Atticus was threatened and his children were treated poorly by their peers, because he had the courage to stand up for the oppressed. Harper Lee's main message to the readers is not to treat others according to who or what they are but according to their behaviours.