The correct answer is B) They were constantly moving from place to place in search of food.
Explanation:
First human societies were hunter-gatherer societies, this means they relied on hunting animals and gathering or collecting food such as fruits, edible roots, etc. This type of surviving strategy forced human groups to move from place to place or to be nomadic because resources where limited in one area, and therefore after some time they need to look for a new place with more resources. Also, in the case of animals, herds constantly moved and people followed them. This means hunter-gatherer societies were nomadic because they need to search for food in new places or "hey were constantly moving from place to place in search of food".
