Preparation of salt from sea water involves

Options

A. evaporation
B. filtration
C. sedimentation and decantation
D. sublimation

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process involved in the preparation of salt from seawater.

2. **Identifying the Processes**: We are given four options:
- Evaporation
- Filtration
- Sedimentation and Decantation
- Sublimation

3. **Analyzing Each Process**:
- **Evaporation**: This is a process where liquid water is converted into vapor when heated. When seawater is heated, the water evaporates, leaving behind the salt.
- **Filtration**: This process is used to separate solids from liquids. In the case of seawater, the salt is dissolved in water, so filtration wouldn’t be effective.
- **Sedimentation and Decantation**: This involves letting impurities settle at the bottom of a liquid. This is not applicable for salt extraction as we are not separating solid impurities from water.
- **Sublimation**: This is the process where a solid turns directly into vapor without becoming liquid. This does not apply to seawater and salt.

4. **Conclusion**: The most suitable process for preparing salt from seawater is **Evaporation**. When seawater is heated, the water evaporates, and the salt is left behind.

5. **Final Answer**: The preparation of salt from seawater involves **Evaporation**.

---