Rise of water level of oceans is due to

Options

A. melting of ice of polar region
B. excess rain water
C. acid rain
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the reason behind the rise of water levels in the oceans.

2. **Identifying Possible Causes**: The options provided include:
- A) Melting of ice in polar regions
- B) Excess rainwater
- C) Acid rain
- D) None of the above

3. **Analyzing Each Option**:
- **Option A (Melting of ice in polar regions)**: This is a significant factor. Global warming leads to the melting of glaciers and ice sheets, especially in polar regions, which contributes to rising sea levels.
- **Option B (Excess rainwater)**: While rainwater contributes to water levels, it does not significantly impact ocean levels on a global scale compared to melting ice.
- **Option C (Acid rain)**: Acid rain affects ecosystems and water quality but does not contribute to the rise in ocean water levels.
- **Option D (None of the above)**: This option is incorrect since melting ice is indeed a cause.

4. **Conclusion**: The primary reason for the rise of ocean water levels is the melting of ice in polar regions due to global warming. Therefore, the correct answer is **Option A**.

**Final Answer**: The rise of water level of oceans is due to the melting of ice in polar regions (Option A).

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