The correct option is A Both, A and R, are true and R is the correct explanation of A
When people of a certain region were brought under the rule of a king, some areas of the kingdom transformed into urban areas. Urban areas had people who were mostly involved in non-agricultural activities. The process of formation of an urban area is known as urbanisation. An administrative centre is usually where the king lived. His armies, officials, advisors settled down in the capital city. The affairs of the king’s territories were monitored and managed from this centre. If the king settles down here, it is bound to urbanise.