Discussion
The Sundarbans, the largest mangrove forest in the world, lies in the delta of which rivers?
Answer: C
Correct answer: The Ganga and the Brahmaputra
The Sundarbans occupies the delta of the Ganga and the Brahmaputra, shared between West Bengal and Bangladesh. It is the largest mangrove forest in the world and a UNESCO World Heritage site. Its name is usually taken from the sundari tree that dominates it. The forest is a maze of tidal creeks and low islands, flooded twice daily, and the mangroves survive the salt by excluding it at the roots and excreting it through the leaves, standing on stilt roots with vertical pneumatophores that take in oxygen the waterlogged mud cannot supply. It is the only mangrove forest inhabited by tigers, and its Bengal tigers are unusual in swimming between islands. It also shelters saltwater crocodiles, the Ganges river dolphin and a great variety of birds. Its practical value is as a storm barrier: the tangled roots absorb cyclone surge and check coastal erosion, protecting Kolkata and the settlements behind it.
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