Analyze the given options and select the one that corresponds to have the least percentage value.

Options

A. The percentage of drugs currently sold in the market worldwide which are derived from plants
B. The estimated percentage of total oxygen in the earth's atmosphere produced by Amazon forest through photosynthesis.
C. The percentage of tropical rain forests covering the earth's land surface presently .
D. The percentage of India share of the global species diversity

Answer

To solve the question, we need to analyze the given options and determine which one has the least percentage value. Let's break down the information provided in the video transcript step by step:

### Step-by-Step Solution:

1. **Identify the Options**:
- Option 1: Percentage of drugs sold worldwide derived from plants.
- Option 2: Percentage of total oxygen produced by the Amazon forest.
- Option 3: Percentage of tropical rainforest covering the Earth's land surface.
- Option 4: Percentage of India's share of global species diversity.

2. **Evaluate Each Option**:
- **Option 1**: The percentage of drugs derived from plants is **25%**.
- **Option 2**: The estimated percentage of total oxygen produced by the Amazon forest is **20%**.
- **Option 3**: The percentage of tropical rainforest covering the Earth's land surface is currently **6%** (after deforestation).
- **Option 4**: The percentage of India's share of global species diversity is **8.1%**.

3. **Compare the Percentages**:
- Option 1: 25%
- Option 2: 20%
- Option 3: 6%
- Option 4: 8.1%

4. **Identify the Least Percentage**:
- Among the percentages evaluated, **6%** (from Option 3 regarding tropical rainforest coverage) is the least.

5. **Conclusion**:
- Therefore, the option that corresponds to the least percentage value is **Option 3: The percentage of tropical rainforest covering the Earth's land surface presently is 6%**.

### Final Answer:
The correct option is **Option 3**.

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