Question

decline of the Indus civilization​

Answer 1

They believe the main cause of the sudden decline is climate change. Huge climate change or natural calamities might have been a cause of the ruin of Harappan civilization. It has been found that some climate change happened around 2000 BC. These changes in climate led to floods in plains and cities.

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Answer 2

Every conclusion regarding the decline is based upon speculations of historians. Though the reason of the decline is not known, but through excavations it is clear that fall of the Harappan Civilization occurred between 1800 BC to 1700 BC. It is commonly believed that the Aryans were the next settlers.