Answer:
D. He uses imagery-based descriptions of the flowers that sprung up untended and the New Yorkers' reaction to them, creating a reflective tone.
Explanation:
The sentence that best describes how the author develops the tone in this passage is sentence D. In this sentence, the author uses descriptions of the flowers that have sprung up in New York. The descriptions are extremely vivid and full of details. Moreover, the author describes how the New Yorkers reacted to this. Both elements are combined in this text in order to create a reflective tone.
