Tea gardens over small mounds of this region is called as 'Bheels'

The correct answer is Surma Valley of Assam . Key Points Surma Valley It is an important tea-producing area in Assam. This valley, lying in the Cachar district, produces about 5 per cent of the country’s tea from 9 per cent of land under this crop. Here the tea gardens are scattered over small mounds called teelas or bheels or well-drained flats along the river and its tributaries. Here rainfall is 300-400 cm and no month is completely dry. Hence, Option 2 is correct. Important Points Surma River It originates in Manipur Hills in Shillong and Meghalaya from India. The total length of this river is 940 Km out of which 350Km is in Bangladesh. Meghna is formed inside Bangladesh in the Kishoreganj District above the town of Bhairab Bazar by the joining of the Surma and the Kushiyara, both of which originate in the hilly regions of eastern India as the Barak River. Additional Information The Brahmaputra Valley It is a region situated between hill ranges of the eastern and northeastern Himalayan ranges in Eastern India. Western Ghats The Western Ghats or the Western Mountain range is a mountain range that covers an area of 160,000 km² in a stretch of 1,600 km parallel to the western coast of the Indian peninsula, traversing the states of Gujarat, Maharashtra, Goa, Karnataka, Kerala and Ta mil Nadu.