1. Name the important mountain passes in the north-western part of the Indian  subcontinent.
2. Who inhabited the upper plains of the river Ganges during the later Vedic period.
3. What were the two important religions which took birth in the middle Gangetic  plains.
4. In which state has tank irrigation been popular since the ancient period.
5. The Kaveri delta is famous for which crop?
6. Name any two foreign tribes that reached India through north-western mountain  passes in ancient times.
7. Which region is known as the ‘breadbasket’ of the subcontinent?