The correct option is C The Pantanal
'X' in the above given question refers to the Pantanal. It is the world’s largest wetland and a gigantic seasonal floodplain. It extends across Paraguay, Bolivia, and Brazil. It covers over 70,000 square miles. Each year torrential rains fill the Pantanal’s giant basin, creating a vast flooded landscape. The Pantanal provides sanctuary to a myriad of wildlife consisting of a rich variety of butteflies, mammals, and reptiles. Interestingly, around 95% of the Pantanal is under private ownership, the majority of which is used for cattle grazing.