Write down why, how and what had happened to have caused a rapid end to the Indus Valley Civilisation.
It ended with Mohenjo-daro being abandoned around 1200 BCE and Harappa soon after. Archaeological evidence, such as signs of constant rebuilding of walls and foundations of houses, suggests that floods could have caused the decline of the Indus Valley Civilisation. These floods would also have destroyed the irrigation systems that the people depended on for their farming. Some scholars think that the floods might have bred mosquitoes which led to outbreaks of malaria. Whatever the reason, the decline was almost certainly speeded up by the invasion of the Indus Valley by a group of people called the Aryans.