The correct answer is B.
The Neolithic Revolution or First Agricultural Revolution was the transition of human cultures from the lifestyle of hunting to gathering to the lifestyle of agriculture and settlements.
Settlement ( sedentism ) is the practice of living in one place for a long time. it also means the transition from nomadic society to a lifestyle that involves remaining in one place permanently.
As a result of the transition, settlements were established as built up villages and towns. It was also the time when the first administrative and political structures came into existence.