The number of hunting and gathering societies decreased because a) they were conquered by eurasian empires. b) animal predators overpowered human hunters. c) people learned how to grow crops and domesticate animals. d) the ice age caused human life to become extinct on earth.

The quantity of hunting and gathering societies declined because C) the people learned to cultivate crops and domesticate animals.

Explanation:

The people in ancient times wandered from places to places in search of food and running behind the animals to hunt them down. But once they discovered that it is possible to grow food by themselves, they began settling down and cultivating crops for food. This ended their need for hunting and gathering food by wandering around.

Later, the land became a symbol to show the power. The land division took place among the people.  

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)