Final answer:
Irrigation systems were created by people living in areas with rugged land to effectively manage water resources for agriculture and sustain urban centers.
Step-by-step explanation:
Due to the rugged land, the people created irrigation systems as a result of settling in different areas. The necessity to manage water resources effectively was a significant driving force behind the development of these systems. In southern Mesopotamia, for instance, early urban centers relied on irrigation to draw water from rivers like the Tigris and Euphrates for agriculture.
Similarly, in the desert regions, oases formed the green dots of civilization around underground water sources, and in ancient times, civilizations such as Rome used engineered systems like aqueducts and dams to supply water. The complexity of managing irrigated agriculture and large urban centers required coordinated efforts, leading to the emergence of governance and sophisticated social structures in these early cities.