The correct answer is B. A city in the future
Step-by-step explanation:
The setting refers to the place and context in which the events described in a story or similar take place, this can be inferred based on the details provided by the writer. In the case of the excerpt presented, this seems to be set in "a city in the future" because the writer includes details such as "traffic", "Pedestrians, crowded together on massive moving " and "towering buildings" that are exclusive from cities rather than from islands, towns or villages. Besides this, there are fictional details such as "airborne traffic" and "purple color of the atmosphere" that depicts a futuristic scenario.