Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — intensive agriculture
Concept & Option Breakdown
Standard Reference VerifiedThe exceptionally high population densities in both the Nile Valley (Egypt) and Java (Indonesia) are historically and geographically sustained by intensive agriculture supported by highly fertile soils (fertile alluvial silt from Nile floods and volcanic soils in Java) and perennial water availability.
Java and the Nile Valley are classic textbook examples of fertile river and volcanic plains supporting agrarian civilizations through wet-rice and intensive riverine farming.
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