Civilizations are organized human communities. Most of the first civilizations, including the one in Mesopotamia, started around a body of water. Mesopotamia actually started near two .

the answer would be c. sediment buildup on continental slope

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chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.