Archaeologists propose several possible reasons for the decline of the Indus civilization. Based on your options, the following responses can be selected:
- The Indus experienced a devastating drought.
- The Indus people migrated to a new region.
While there are theories regarding the impact of Aryan migration and environmental factors like deforestation, the most widely supported reasons tend to focus on climate change and migration. Thus, the most plausible options are the drought and migration.