Changes in the monsoon winds and environmental factors played key roles in the decline of the Indus River valley civilization.
Changes in the monsoon winds contributed most to the decline of the Indus River valley civilization. Weakened monsoon rains led to drought conditions, impacting agriculture and water supply, key factors for the civilization's survival.
Another significant factor was the movement by tectonic plates, possibly leading to earthquakes, flooding, and shifts in river courses, affecting the civilization's infrastructure and food supply.
Additionally, environmental degradation from resource exploitation and high population density, compounded by climate change and disease susceptibility, further weakened the civilization.
https://brainly.com/question/12197580