An important international effort or convention for biodiversity conservation is

Options

A. UNESCO
B. WWF
C. IBWL
D. NBPGR

Answer

### Step-by-Step Solution:

1. **Understanding Biodiversity**:
- Biodiversity refers to the variety of life forms on Earth, including plants, animals, and microorganisms in a specific habitat.

2. **Evaluating the Options**:
- The question provides several organizations as options for important international efforts in biodiversity conservation. We will analyze each option.

3. **Analyzing UNESCO**:
- UNESCO stands for the United Nations Educational, Scientific and Cultural Organization.
- Its main objectives include promoting peace, eradicating poverty, and fostering sustainable development.
- **Conclusion**: While it contributes to various global issues, it is not primarily focused on biodiversity conservation. Thus, this option is incorrect.

4. **Analyzing WWF**:
- WWF stands for the World Wide Fund for Nature.
- This organization is one of the leading conservation groups dedicated to protecting the natural environment and promoting biodiversity conservation.
- It was established on April 29, 1961, and has a strong focus on the conservation of various species and their habitats.
- **Conclusion**: This is the correct option as it is primarily concerned with biodiversity conservation.

5. **Analyzing IBWL**:
- IBWL stands for the Indian Board for Wildlife.
- Its main aim is to prevent cruelty against wildlife and promote public interest in wildlife conservation.
- While it focuses on wildlife, it does not encompass the broader scope of biodiversity conservation.
- **Conclusion**: This option is also incorrect.

6. **Analyzing NBPGR**:
- NBPGR stands for the National Bureau of Plant Genetic Resources.
- This organization focuses specifically on the conservation and management of plant genetic resources.
- **Conclusion**: Since it is limited to plants and does not address overall biodiversity, this option is incorrect.

7. **Final Answer**:
- After analyzing all the options, the most important international effort or convention for biodiversity conservation is the **WWF (World Wide Fund for Nature)**.