Lol
the primary reason ancient people of the nile river valley built levees, dikes and reservoirs was to
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The primary reason ancient people of the Nile river valley built levees,dikes and reservoirs was to harness the water and power of the Nile River in order to irrigate crops, which stimulated growth. 

The social difference that caused sectionalism in the antebellum era would be c.)  north was disorganized. the north had slow population growth, where as the south had mass immigration.hope this really mark