Tell us about the origin of agriculture and animal husbandry.

People noticed that the grains of ears or fruits, falling on loose soil, germinate and bear fruit. They realized that food could be grown and began to plant seeds of edible plants in the ground. So farming arose from gathering.
Returning home, the hunters sometimes brought with them the young of the animals they killed and fed them until they were old enough. So gradually people tamed and began to breed pigs, sheep, goats and cows. Thus, cattle breeding arose from hunting.