Which decade is/was declared as the 'UN Decade of Ocean Science for Sustainable Development'?

Correct option is D

The correct answer is (d) 2021–2030.
Explanation:
● The United Nations declared the years 2021 to 2030 as the 'UN Decade of Ocean Science for Sustainable Development'.
● The initiative aims to provide a common framework to ensure that ocean science can fully support countries’ actions to sustainably manage the oceans.
Information Booster:
● UNESCO's Intergovernmental Oceanographic Commission (IOC) is the leading agency for this decade.
● It focuses on the UN Sustainable Development Goal 14: "Life Below Water."
Additional Knowledge:
● 2011–2020 was the UN Decade on Biodiversity.
● 2021–2030 is also the UN Decade on Ecosystem Restoration.