Boiling shows what type of phenomenon ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Boiling**: Boiling is the process where a liquid turns into vapor when it is heated to its boiling point. At this point, the vapor pressure of the liquid equals the atmospheric pressure.

2. **Distinguishing Between Evaporation and Boiling**:
- **Evaporation** occurs at any temperature below the boiling point and only at the surface of the liquid. It involves the conversion of liquid into vapor without the need for the entire liquid to reach a specific temperature.
- **Boiling**, on the other hand, involves the entire volume of the liquid. When the liquid reaches its boiling point, bubbles of vapor form throughout the liquid, not just at the surface.

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