When is World Environment Day, recognized by the UN observed?

11-Dec
20-Dec
15-Sep
05-Jun

The correct answer is D. 5 June.

World Environment Day is an annual event celebrated on 5 June to raise awareness of environmental issues. It was first held in 1972, and is now coordinated by the United Nations Environment Programme (UNEP). The theme for World Environment Day 2023 is “Only One Earth.”

The other options are incorrect. 11 December is the International Day of Human Rights. 20 December is the International Day of Solidarity with the Palestinian People. 15 September is the International Day of Peace.