AP BIOLOGY

Detailed explanation-1: -Farming enabled people to grow all the food they needed in one place, with a much smaller group of people. This led to massive population growth, creating cities and trade.

Detailed explanation-2: -More abundant food supplies could support denser populations, and farming tied people to their land. Small settlements grew into towns, and towns grew into cities. Agriculture produced enough food that people became free to pursue interests other than worrying about what they were going to eat that day.

Detailed explanation-3: -The first agrarian civilizations developed at about 3200 BCE in Mesopotamia, in Egypt and Nubia (now northern Sudan), and in the Indus Valley. More appeared in China a bit later and in Central America and along the Andes Mountains of South America at about 2000–1000 BCE.

Detailed explanation-4: -When early humans began farming, they were able to produce enough food that they no longer had to migrate to their food source. This meant they could build permanent structures, and develop villages, towns, and eventually even cities. Closely connected to the rise of settled societies was an increase in population.