The term ... (Smallest sustainable unit of biosphere ) was proposed by ....

Options

A. Ecology , Grinnel
B. Ecosystem , Tansley
C. Ecology , Lindeman
D. Ecosystem , Reiter

Answer

To solve the question, we need to identify the term that represents the smallest sustainable unit of the biosphere and the individual who proposed this term.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that signifies the smallest sustainable unit of the biosphere and the person who proposed this term.

2. **Analyzing the Options**: We have four options to consider:
- Option 1: Ecology and Green Earth
- Option 2: Ecosystem and Tansley
- Option 3: Ecology and Claimant
- Option 4: Ecosystem and Trader

3. **Evaluating Each Option**:
- **Option 1**: "Ecology and Green Earth" - Ecology is the study of interactions between organisms and their environment, but it is not the term for the smallest sustainable unit of the biosphere. Therefore, this option is incorrect.
- **Option 2**: "Ecosystem and Tansley" - The term "Ecosystem" is widely recognized as the smallest sustainable unit of the biosphere. The term was proposed by Arthur Tansley in 1935. This option is correct.
- **Option 3**: "Ecology and Claimant" - Similar to option 1, this option incorrectly pairs ecology with another term. This option is incorrect.
- **Option 4**: "Ecosystem and Trader" - This option incorrectly attributes the term "Ecosystem" to someone named Trader, which is not accurate. This option is incorrect.

4. **Conclusion**: After evaluating all the options, the correct answer is:
- **Term**: Ecosystem
- **Proposed by**: Tansley

### Final Answer:
The term "Ecosystem" (smallest sustainable unit of biosphere) was proposed by "Tansley".

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