According to the passage, subsistence societies depend mainly on ____________.

* Hướng dẫn giải

Chọn B

Thông tin ở đoạn 3: “that a society based on hunting and gathering must be very mobile. While the entire community camps in a central location, a smaller party harvests the food within a reasonable distance from the camp. When the food in the area has become exhausted, the community moves on to exploit another site.”