Explanation:

Convention on Biological Diversity:
The Convention on Biological Diversity (CBD) is an international treaty that aims to promote sustainable development while preserving the Earth's biological diversity. It was opened for signature at the Earth Summit in Rio de Janeiro in 1992.

Number of Articles:
The CBD consists of 42 articles that outline the objectives, principles, and commitments of the treaty. These articles cover a wide range of topics related to biodiversity conservation, sustainable use of biological resources, and fair and equitable sharing of benefits arising from genetic resources.

Key Points:
- The CBD has three main objectives: the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of the benefits arising from the utilization of genetic resources.
- The CBD recognizes the importance of traditional knowledge and practices of indigenous and local communities in the conservation and sustainable use of biodiversity.
- Parties to the CBD are required to develop national strategies, plans, and programs for the conservation and sustainable use of biodiversity.
- The CBD emphasizes the need for international cooperation and support for developing countries in implementing its provisions.
Therefore, the correct answer is option 'b) 42 articles', as the Convention on Biological Diversity consists of 42 articles that form the basis of the international treaty.