character: Mesopotamians
topic: Water Management Techniques in Ancient Agriculture
grade: 9
subject: Social Studies
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character: Egyptians
topic: Irrigation Systems Along the Nile
grade: 9
subject: Social Studies
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character: Indus Valley Civilization
topic: Advanced Drainage and Well Systems
grade: 9
subject: Social Studies
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character: Chinese
topic: Early Water Management and Rice Cultivation
grade: 9
subject: Social Studies
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