What was the significance of the land left behind by the Indus River's frequent floods?

The land left behind by the Indus River's frequent floods was significant because it produced fine-grained soil known as silt. When the river flooded, it deposited nutrient-rich silt onto the surrounding land. This fertile soil greatly enhanced agricultural productivity, allowing early civilizations in the Indus Valley to cultivate a variety of crops. The presence of this silt made the region one of the most fertile areas in the world, enabling the development of complex societies and contributing to the growth of urban centers. This aspect of the soil played a vital role in sustaining large populations and supporting the advancement of civilizations in the Indus Valley, exemplifying how geographical features can influence human settlement and societal development.