Third Person Objective—the narrator is not part of the story and does not know characters’ thoughts or a feeling, but only states their actions and speech. Imagine you are holding a video camera. You see all the action, but there is no one to tell you what the actors are thinking.
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Personally, I would say that "The city is so big" best captures life in the city, because it describes how busy the city is, and how everything happens so fast it just rushes by. It explains that even people get lost in the wonder and chaos of the city, disappearing into life.
Answer: It's ironic because it's irony, and there's an iron in the image.
Answer: "Hello, to whom am I speaking with"
Answer: All answers are correct