The correct answer is: A. May 22
World Water Day is an annual United Nations observance held on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources. It was designated by the United Nations General Assembly in 1992 and first celebrated in 1993.
The theme for World Water Day 2023 is “Groundwater: Making the Invisible Visible”. Groundwater is the largest source of freshwater on Earth, covering about 99% of all liquid freshwater. It is essential for life, supporting ecosystems, agriculture, industry and domestic water supplies. However, groundwater is under threat from overexploitation, pollution and climate change.
World Water Day is an opportunity to raise awareness of the importance of groundwater and to promote its sustainable management. It is also a time to take action to protect groundwater resources and to ensure that everyone has access to safe and clean water.
The other options are incorrect because they are not the dates on which World Water Day is celebrated.