(a) Bhitarkanika Mangroves
(b) Marakkanam Salt Pans
(c) Naupada Swamp
(d) Rann of Kutch
Answer: (d)
A. Bhitarkanika Mangroves is a mangrove wetland in Odisha, India, covering an area of 650 km (400 mi) in the Brahmani River and Baitarani River deltas.
B. The Marakkanam salt pans are spread over an area of 4,000 acres and is one of the largest producers of salt in Tamil Nadu. These salt pans support the livelihood of around 1,000 workers every day during peak season, starting January each year.
C. A nematode infestation has led to mass mortality of spot-billed pelicans (Pelicanus philippensis) at Telineelapuram Important Bird Area (IBA) in Naupada swamp of Srikakulam district in Andhra Pradesh. D.Rann of Kutch was once a shallow part of the Arabian Sea, until a geological shift closed off the connection with the sea. The region became a seasonal marshy salt desert over the years.

