Which major river flows through the northern and northeastern regions of India? Keep in mind that this river has played a huge role in the development of Indian civilization.
The alternation of floods and droughts in the Indus Valley forced people to work together to build systems of dams and canals for flood defense and irrigation.
Thus, around 2500 BC Christ in the Indus Valley formed the cities of Harappa and Mohenjo Daro.
They were founded by the Dravids, the oldest population of India.
