Question

what were the cause of the decline of the harappan civilisation​

Answer 1

Answer:

the causes were:-

Explanation:

Many scholars believe that the collapse of the Indus Valley Civilization was caused by climate change. ... By 1800 BCE, the Indus Valley climate grew cooler and drier, and a tectonic event may have diverted or disrupted river systems, which were the lifelines of the Indus Valley Civilization.

Answer 2

Explanation:

As per some scholars, the reason of the decline is the change in the course of River Ghaggar-Harka that had led to an increase in aridity of the place. Around 2000 B.C there was found an increase in arid conditions. The location where the Indus valley civilization once flourished is a desert today.