Identify the part which vibrates to produce sound in the instruments.
Flute

Explanation

To identify the part that vibrates to produce sound in a flute, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Flute Structure**:
- A flute is a musical instrument that consists of a long, hollow tube with a mouthpiece at one end and an opening at the other end.

2. **Air Flow**:
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