Respuesta :
D, since agriculture and ranching was unexistent, causing people to quickly use up 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.