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A map titled Ancient Civilizations of Africa and Asia. A key shows Ancient civilizations by color. China is blue, Egypt is orange, the Indus River valley is green, Mesopotamia is red. Blue shading covers about half the length of the Yellow River. Orange shading closely follows the path of the northern section of the Nile River. Green shading surrounds the Indus River and extends inland north and slightly east. the Tigris and Euphrates rivers run through Mesopotamia, which is shaded red.
What geographical advantages did the river valley civilizations have over the Mesoamerican civilizations? Choose two correct answers.
less coastline
narrower landforms
larger river systems
fewer geographic barriers
more jungles and wetlands
