In Biosphere Reserves of India, which term combines the facts “it lies within the lower Ganga-Brahmaputra-Meghna delta” and “cyclones and salinity are major ecological pressures”?

Correct Answer: Option D — Sundarban Biosphere Reserve. Sundarban Biosphere Reserve is correct because it is cyclones and salinity are major ecological pressures. Sundarban Biosphere Reserve is also specifically associated with it lies within the lower Ganga-Brahmaputra-Meghna delta. Two additional identifying facts are that Sundarban Biosphere Reserve is tidal creeks, mudflats and mangrove islands dominate the landscape and Sundarban Biosphere Reserve is associated with cyclones and salinity are major ecological pressures. Why the other options are incorrect: • Option A — Pachmarhi Biosphere Reserve: Pachmarhi Biosphere Reserve is forest and plateau habitats support central Indian biodiversity. • Option B — Nilgiri Biosphere Reserve: Nilgiri Biosphere Reserve is it was India's first designated biosphere reserve. It is incorrect here because its separate identifying association is it spans parts of Tamil Nadu, Kerala and Karnataka. • Option C — Nanda Devi Biosphere Reserve: Nanda Devi Biosphere Reserve is altitudinal zonation supports varied Himalayan biodiversity. It is incorrect here because its separate identifying association is Nanda Devi and Valley of Flowers landscapes are associated with it. Exam Takeaway: Connect Sundarban Biosphere Reserve with “cyclones and salinity are major ecological pressures” and “it lies within the lower Ganga-Brahmaputra-Meghna delta”.