This map shows the population density of India. The redder the area, the higher the concentration of the population.

Which is the MOST likely reason for the high population density in the northeastern part of India?

The most likely reason for the high population density in the northeastern part of India is its proximity to Bangladesh, which has a high population density itself. This has led to increased migration of people from Bangladesh to India, resulting in a higher population density in the northeastern part of India.