Prehistoric Mizoram was likely connected to other parts of Northeast India and Southeast Asia through:

The correct answer is: All of the above.

Prehistoric Mizoram was likely connected to other parts of Northeast India and Southeast Asia through migration routes, trade networks, and shared cultural practices.

• Migration routes. There is evidence that people have been migrating to Mizoram for thousands of years. The earliest inhabitants of Mizoram were likely hunter-gatherers who migrated from Southeast Asia. Later, people from other parts of India and Southeast Asia also migrated to Mizoram. These migrations brought new people, languages, and cultures to Mizoram.
• Trade networks. Mizoram has been a part of trade networks for centuries. The people of Mizoram traded with people from other parts of India, Southeast Asia, and China. This trade brought new goods, ideas, and technologies to Mizoram.
• Shared cultural practices. The people of Mizoram share many cultural practices with people from other parts of Northeast India and Southeast Asia. These shared cultural practices include language, religion, music, dance, and art.

The connections between Mizoram and other parts of Northeast India and Southeast Asia have been important for the development of Mizoram’s culture and history.