WORLD HISTORY

Detailed explanation-1: -Many scholars believe that the collapse of the Indus Valley Civilization was caused by climate change. Some experts believe the drying of the Saraswati River, which began around 1900 BCE, was the main cause for climate change, while others conclude that a great flood struck the area.

Detailed explanation-2: -Answer: The Indus valley civilization started declining from about 1900 BCE. Changes in climate, decline of trade with Mesopotamians, drying up or flooding of the river, foreign invasion of Indus civilisation might have been the reasons for the decline of this civilization.

Detailed explanation-3: -The dry spell, lasting 900 years, slowly destroyed its irrigation systems, devastated agriculture and eventually forced Indus people at places such as Harappa and Mohenjo-Daro to abandon the thriving urban culture.

Detailed explanation-4: -There are many causes for the decline of Harappan civilisation. There were regular floods in the Indus and its tributaries. The overuse of wood for burning bricks that destroyed the forests, which made them migrate. The Aryans, who came from the north, could have attacked them.

Detailed explanation-5: -Located on the bank of Indus River in the southern province of Sindh, Mohenjodaro was built around 2400 BC. It was destroyed at least seven times by the floods and rebuilt on the top of ruins each time as there is evidence of silt on houses and streets of the civilisation.