When did the South
Americans start growing
maize and beans?

Corn appears to have been the first cultigen in the Southwest. Direct radiocarbon dates place it at the Bat Cave site in the Mogollon highlands of New Mexico by 3200 bp, where squash is also present. The first beans appear about 1500 bp.

Explanation: pls mark branliest!

Isra

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)