Final answer:
The reason so many immigrants moved into fast-growing cities was because they were looking for jobs.
Step-by-step explanation:
The reason so many immigrants moved into fast-growing cities was because they were looking for jobs. Fast-growing cities offered more job opportunities and the promise of a better life for immigrants. These cities were often industrial hubs, such as New York City, where immigrants could find work in factories and other industries that were rapidly expanding during the late 19th and early 20th centuries.
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