Ocean is the largest sink (remover) for

Options

A. PAN
B. `NO_(2)`
C. `CO_(2)`
D. `SO_(2)`

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what the ocean is the largest sink for, which means we need to identify what substances the ocean absorbs or removes significantly.

2. **Identifying Ocean Functions**: The ocean plays a crucial role in various environmental processes, including the absorption of gases and nutrients. One of the most significant functions of the ocean is its ability to absorb carbon dioxide (CO2) from the atmosphere.

3. **Photosynthesis in Oceans**: The ocean is home to phytoplankton, which perform photosynthesis. This process not only produces oxygen but also consumes carbon dioxide. It is estimated that the ocean produces around 55 billion tons of oxygen per year through this process.

4. **Conclusion**: Based on the information gathered, the ocean acts as the largest sink for carbon dioxide (CO2) due to its capacity to absorb it and the role of marine plants in photosynthesis.

5. **Final Answer**: Therefore, the ocean is the largest sink for carbon dioxide (CO2).

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