Answer:
All three of these societies are interconnected as they are part of Indian Subcontinent history.
Historically, Harappa/ Mohenjo-Daro was one of the oldest ancient civilizations.
Dravidians are ethnolinguistic groups living in South India.
Aryans were the outsiders who arrived in India in ancient times.
Harappa/ Mohenjo-Daro is dated back to 2600 BC.
These societies were different by their culture and customs.
Indus Valley is in modern-day Pakistan.
The occupation of the people in the Indus Valley was agriculture, pottery making, artisans, etc.
They interacted through a trade where goods were exchanged in form of a barter system.
