Before the development of agriculture what was the most likely reason for groups of people to move from one place to another constantly? a. yearly floods drove people away from rivers. b. the climate in ancient times was more unpredictable. c. attacking mongols pushed people west. d. people moved as they used up local food sources.

Answer;

D. People moved as they used up local food sources

Explanation;

Agriculture and ranching were no in existence, therefore, people would quickly use up food sources.

As a result they had to follow the food. Like most large animals, humans had to be migratory because they had to follow food sources around.

Later the coming of agriculture gave humans the ability to domesticate and grow their food, which enabled people to stay in one place.

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