When was 'World Earth Day' observed?

Correct option is B

The correct answer is (b) April 22
· World Earth Day is observed on April 22 every year. It is an annual event celebrated globally to raise awareness about environmental protection and promote efforts to preserve our planet. The first Earth Day was celebrated in 1970, and since then, it has grown into a global movement for environmental sustainability and advocacy.
Information Booster:
· Earth Day was initiated by Senator Gaylord Nelson from the United States to focus on environmental issues and create awareness about the need for conservation.
· The event is coordinated by the Earth Day Network and is celebrated by more than 1 billion people worldwide.
Additional Information:
· March 22: Observed as World Water Day, focusing on the importance of freshwater and sustainable water resource management.