Which best explains how the structure of this passage supports the authors purpose

The letter D is the right answer.

Explanation:

The excerpt shows how nature will provide a way to get rid of pollution in a post-human world. According to the text, the rain will have a beneficial effect, removing the pollution caused by chemicals in the trees. Without human intervention, little by little the trees will get rid of all chemical compounds and nature will return to its natural state.

a

explanation:

because i the point in view is between characters

dr. kings dream speech

explanation:

it was late in the day and hot, and after a long march and an afternoon of speeches about federal legislation, unemployment and racial and social justice, the rev. dr. martin luther king jr. finally stepped to the lectern, in front of the lincoln memorial, to address the crowd of 250,000 gathered on the national mall.