Select the correct statement for cloud seeding

Options

A. It promotes rainfall
B. It suppress fog
C. Most commonly used chemical for cloud seeding is silver iodide because it has a crystaline structure to that of ice
D. It helps is snow fall.

Explanation

To solve the question regarding cloud seeding, we need to analyze each statement provided in the options and determine which one is correct. Here’s a step-by-step breakdown:

### Step 1: Understand Cloud Seeding
Cloud seeding is a weather modification technique that involves dispersing substances into the atmosphere to encourage precipitation (rain or snow) from clouds.

### Step 2: Analyze Each Statement
1. **It promotes rainfall.**
- This statement is true. Cloud seeding is primarily used to enhance rainfall by introducing certain chemicals into clouds.

2. **It suppresses fog.**
- This statement is also true. Cloud seeding can help reduce fog by altering the conditions in the atmosphere.

3. **Most commonly used chemical for cloud seeding is silver iodide because it has a crystalline structure similar to that of ice.**
- This statement is correct. Silver iodide is indeed the most commonly used chemical for cloud seeding due to its crystalline structure, which allows it to effectively serve as a nucleus for ice crystal formation.

4. **It helps in snowfall.**
- This statement is true as well. Cloud seeding can enhance snowfall by promoting the formation of ice crystals in clouds.

### Step 3: Conclusion
Since all the statements provided in the options are correct regarding cloud seeding, we can conclude that the correct answer is that all options are valid.

### Final Answer
All the options regarding cloud seeding are correct.

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