Without specific context or details about "Astoria," it's challenging to provide the exact closing lines or their intended achievements. However, generally, effective closing lines in a narrative may aim to accomplish the following:
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Resolve Key Themes and Questions: They should tie up important themes presented throughout the story and address any questions raised during the plot.
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Leave a Lasting Impression: They may evoke a strong emotional response or provoke thought, ensuring that the audience reflects on the story after it ends.
If you have specific lines or themes in mind from "Astoria," please provide more details, and I can offer a more tailored analysis!