The term biodiversity was purposed by W.G. Rosen in 1985.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Biodiversity":**
- Biodiversity refers to the variety of life forms on Earth, encompassing the differences among living organisms from all sources. This includes terrestrial, marine, and other aquatic ecosystems.

2. **Components of Biodiversity:**
- Biodiversity includes variability among organisms at different levels, such as species diversity, genetic diversity, and ecosystem diversity. It covers all habitats, including freshwater, brackish water, and various ecological complexes.

3. **Etymology of the Term:**
- The term "biodiversity" is derived from the prefix "bio," meaning life, and "diversity," indicating variety. Thus, it signifies the diversity of life forms.

4. **Historical Context:**
- The concept of biodiversity was formally introduced by Walter G. Rosen in 1985. This was significant as it provided a framework for understanding the importance of biological variety in ecosystems.

5. **Conclusion:**
- The statement that "the term biodiversity was proposed by W.G. Rosen in 1985" is accurate and reflects the importance of recognizing and conserving the variety of life on Earth.

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