The use of rivers for irrigation in agriculture began in about a. 10,000 bce b. 6,000 bce c. 2,000 bce d. 500 bce

Iam pretty sure it is c. 2000 bce

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.