Through photosynthesis , the lungs of earth, Amazon forest is estimated to produce ..... of the total oxygen in earth's atmosphere .

Options

A. One - third
B. One - fourth
C. One - fifth
D. One - sixth

Answer

To solve the question regarding the contribution of the Amazon rainforest to the total oxygen in Earth's atmosphere through photosynthesis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of the Amazon Rainforest**:
- The Amazon rainforest is often referred to as the "lungs of the Earth" because of its significant role in producing oxygen through photosynthesis.

2. **Identify the Contribution**:
- It is widely recognized that the Amazon rainforest contributes approximately 20% of the total oxygen in the Earth's atmosphere.

3. **Convert Percentage to Fraction**:
- To express 20% as a fraction, we can write it as:
\[ 20\% = \frac{20}{100} = \frac{1}{5} \]

4. **Select the Correct Option**:
- From the options provided (1 third, 1 fourth, 1 fifth, or 1 sixth), we can see that \(\frac{1}{5}\) corresponds to the contribution of the Amazon rainforest.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the Amazon rainforest is estimated to produce **1 fifth** of the total oxygen in Earth's atmosphere.

### Final Answer:
- The Amazon rainforest produces **1 fifth** of the total oxygen in Earth's atmosphere.