Answer:
River valley civilizations developed and persisted through time due to several key factors such as proximity to major rivers, advanced technologies, complex systems of government, religion and economic systems, and natural defenses.
Step-by-step explanation
Key Factors in the Development of River Valley Civilizations:
Proximity to Major Rivers:
Provided essential resources such as water for irrigation, transportation, and food in the form of fish and fertile soil for farming.
Communication and Trade:
Rivers served as a means of communication and trade, connecting different regions and promoting the growth of urban centers and the development of complex societies.
Advanced Technologies:
such as irrigation systems, allowed control and management of water from rivers, making it possible to sustain large populations.
Complex Systems of Governance:
Government, religion, and economic systems, allowed for adaptation and evolution as populations grew and new challenges emerged, providing stability.
Natural Defenses:
Deserts or mountains protected against invaders, helped these civilizations to persist through time.