So far, which of the following countries has not ratified the Convention on Biological Diversity?

Correct option is D

The United States of America has not ratified the Convention on Biological Diversity (CBD), even though it signed the agreement in 1993. The USA remains one of the few countries that have not ratified this international treaty, which aims to promote sustainable development and the conservation of biodiversity.
Information booster:
· India, China, and Russia have all ratified the Convention on Biological Diversity.
· The CBD focuses on the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of benefits arising from genetic resources.
Additional knowledge:
1. The CBD was adopted at the Earth Summit in Rio de Janeiro in 1992 and is a legally binding treaty.
2. While the USA has not ratified the CBD, it participates in related biodiversity discussions and initiatives.