The correct answer is A) They hunted and gathered their food and D) they moved from place to place looking for food.
The following were characteristics of early humans during the Old Stone Age: They hunted and gathered their food and they moved from place to place looking for food.
These early humans were nomads that followed herds to hunt the animals and feed their families. They also collected fruits and berries. They were a primitive form of humans that did not know how to farm. Humans learned agriculture techniques until the Neolithic Revolution when humans settled in one place and started to farm the land. For instance, the Sumerians in Mesopotamia, that settled in between the Tigris and Euphrates Rivers.