Answer:
Development of agriculture
Explanation:
Development of agriculture helped ancient civilizations to settle in one place and focus on growing crops. Agriculture developed near river making lands around them fertile and provided fresh water for irrigation. Civilizations were able to establish their kingdom with people in a large group. They now engaged in other activities including trade, conquering neighbour states, developing technology, building structures, etc.
by making it easier for bootleggers to branch into other types of illegal activity
I belie that it is the Military Demarcation Line.
I think the statement is true.