Explanation:

International Day for Biological Diversity 2021

• Celebrated each year on May 22.
• This year, 2021, the theme is “We’re part of the solution”.

Background: The resolution to celebrate the day was adopted in 1992. The day was initially celebrated on December 29 till 2000 starting from 1993. It was marked on December 29 to celebrate the Day the Convention on Biological Diversity came into effect. It was later shifted to May 22 to commemorate the adoption of the convention at Rio Earth Summit.
The Convention on Biological Diversity

• At the 1992 Earth Summit in Rio de Janeiro, world leaders agreed on a comprehensive strategy for “sustainable development” — meeting our needs while ensuring that we leave a healthy and viable world for future generations. One of the key agreements adopted at Rio was the Convention on Biological Diversity.
• The Convention on Biological Diversity is the international legal instrument for “the conservation of biological diversity, the sustainable use of its components and the fair and equitable sharing of the benefits arising out of the utilization of genetic resources” that has been ratified by 196 nations.
• The Cartagena Protocol on Biosafety to the Convention on Biological Diversity & the Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization to the Convention on Biological Diversity.

Hence option 3rd is correct.