The correct answer is option 2: Bhabar. Explanation & Key Takeaways: • Four regions can be distinguished within the Northern Plains. • Pebbles are left behind by rivers as they flow down from the mountains in a thin band • Which is 8 to 16 km wide and runs parallel to the Shiwaliks' slopes. It is called bhabar. • The bhabar belt is where all the streams end. • The streams and rivers reemerge south of this belt, forming the terai, a moist, marshy area. • This area was heavily forested and home to a variety of animals. • After Pakistan was divided, the forests were removed to make way for agricultural land and the settlement of migrants.