Correct option is D
• Earth Day is celebrated on 22nd April every year.
• It aims to raise awareness about environmental protection and sustainability.
Information Booster:
• First celebrated in 1970 in the United States.
• It is now observed in more than 190 countries.
Additional Knowledge:
• 23rd April – World Book Day
• 24th April – National Panchayati Raj Day (India)
• 25th April – World Malaria Day