Which of the following is not likely to cause Tsunami?

Options

A. A major nuclear explosion under sea
B. Earthquake
C. Volcanic eruption
D. Lightning

Explanation

To determine which of the following options is not likely to cause a tsunami, we will analyze each option provided.

### Step 1: Analyze each option

1. **Nuclear explosion under the sea**: A nuclear explosion can cause a significant displacement of seawater due to the force of the explosion. This displacement can generate waves, leading to a tsunami. Therefore, this option is likely to cause a tsunami.

2. **Earthquake**: Earthquakes, especially those that occur on the seabed, can cause a sudden displacement of water. This displacement is one of the primary causes of tsunamis, as seen in historical events like the 2011 Japan tsunami. Thus, this option is also likely to cause a tsunami.

3. **Volcanic eruption**: Volcanic eruptions can lead to tsunamis as well. When a volcano erupts, it can displace a large volume of water, either through the explosion itself or through landslides into the ocean. Therefore, this option can also cause a tsunami.

4. **Lightning**: Lightning is an atmospheric phenomenon that occurs due to electrical discharges in the atmosphere. It does not cause any significant displacement of water in the ocean that would lead to a tsunami. Therefore, this option is not likely to cause a tsunami.

### Step 2: Conclusion

After analyzing all the options, we can conclude that the option that is not likely to cause a tsunami is **lightning**.

### Final Answer:
**Lightning** is not likely to cause a tsunami.

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