The correct answer is: C. June 05
World Wetlands Day is celebrated on 05 June every year. It is a day to raise awareness about the importance of wetlands and the need for their conservation. Wetlands are areas of land that are saturated with water, either permanently or seasonally. They include swamps, marshes, bogs, and fens. Wetlands play an important role in the environment by providing habitat for wildlife, filtering water, and storing carbon. They are also important for recreation and education.
Option A is incorrect because February 02 is not World Wetlands Day.
Option B is incorrect because February 28 is not World Wetlands Day.
Option D is incorrect because March 21 is not World Wetlands Day.