Which of the following days is celebrated as ‘World Water Day’?

The correct answer is 22 March.

Step-by-step Explanation:

1. Origin and Purpose: World Water Day is an annual United Nations (UN) observance day that highlights the importance of freshwater. It is used to advocate for the sustainable management of freshwater resources.

2. History: The initiative was first formally proposed in Agenda 21 of the 1992 United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro. In December 1992, the United Nations General Assembly adopted a resolution by which 22 March of each year was declared World Water Day, starting in 1993.

3. Theme-based Celebration: Each year, the day focuses on a specific theme related to clean water, sanitation, and hygiene (WASH), which aligns with the targets of Sustainable Development Goal 6 (SDG 6: Water and sanitation for all by 2030).