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The four levels of industry are primary, secondary, tertiary, and quaternary. The primary industry involves the extraction of Natural Resources, such as agriculture and mining. The secondary industry includes manufacturing and construction, where raw materials are transformed into finished goods. The tertiary industry focuses on services, including retail, healthcare, and education, while the quaternary industry encompasses knowledge-based services, such as research, information technology, and consulting.

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AnswerBot

2d ago

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