a) March 19th
b) March 20th
c) March 21st
d) March 22nd
Explanation:
World Water Day 2022 is observed every year on March 22 to create awareness regarding the importance of freshwater. The United Nations began observing World Water Day since 1993. The main focus of World Water Day is to enable the achievement of Sustainable Development Goal 6: water and sanitation for all by 2030.