What led to the end of Indus Valley Civilization?

Solution(By Examveda Team)

The natural factors could be geological and climatic. It is believed that the Indus Valley region experienced several tectonic disturbances which caused earthquakes. These upheavals not only disturbed their life but also changed courses of rivers or dried them up. The modern satellite imagery confirms dramatic shifts in the river courses, which might have caused great flood cutting the food producing areas from urban centres. This is evident from the quantities of silt layers in the upper levels of Mohenjo Daro indicating heavy floods. Another natural reason might be changes in patterns of rainfall. During the mature Harappan age in 2500 BC, there was a great rise in the amount of rainfall, but by the beginning of the second millennium BC it had dropped dramatically thus affecting food production adversely. With the rivers shifting their courses, the rainfall declining and sufficient food failing to arrive from the countryside, there was a slow but inevitable collapse of the Indus System.