It is observed that the temperature of the surroundings starts falling when the ice in a frozen lake starts melting. Give a reason for the observation.

Explanation

To answer the question about why the temperature of the surroundings falls when the ice in a frozen lake starts melting, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Process of Melting:**
- When ice melts, it undergoes a phase change from solid to liquid. This process requires energy, known as the latent heat of fusion.

2. **Source of Energy:**
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