Answer:
B. sedentary agriculture
Explanation:
Our ancestors left hunting and gathering to cultivate wheat, barley and other cereals. At that moment, the man stopped being nomadic, to become sedentary and to settle in one place. The only way for man to settle in one place was sedentary agriculture.
The sedentary lifestyle allowed the construction of larger villages with mud houses, where animals were later domesticated (initially dogs, sheep, goats and pigs) and laid the foundations of commerce. Around 4000 BC, the first civilizations appeared on the banks of the Tigris, Euphrates, Nile, Indus and Yellow rivers. The mastery of metallurgy drove other changes, as did the invention of writing, which encompasses prehistory. For most researchers, agriculture has brought progress. However, some define it as tragic.
