The membrane of a drum vibrates to produce sound. Similarly the strings of a sitar vibrates to produce sound. Based on these two examples answer the following question. Which part of a whistle vibrates to produce sound ?

Options

A. body of whistle
B. air
C. mouth of the person
D. all of the above

Explanation

To determine which part of a whistle vibrates to produce sound, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Mechanism of Sound Production**:
- Sound is produced when an object vibrates. In the case of a drum, the membrane vibrates, and for a sitar, the strings vibrate.

2. **Identifying the Components of a Whistle**:
- A whistle typically consists of a body, a mouthpiece, and an opening where the sound comes out.

3. **Analyzing How a Whistle Works**:
- When a person blows air into the whistle through the mouthpiece, the air travels through the body of the whistle.
- The air pressure builds up inside the whistle, and as it escapes through the opening, it causes vibrations.

4. **Determining the Vibrating Part**:
- The vibrations that produce sound in a whistle primarily occur in the body of the whistle as the air moves through it and exits.

5. **Choosing the Correct Option**:
- Based on the analysis, the part of the whistle that vibrates to produce sound is the body of the whistle. Therefore, the correct answer is **Option 1: Body of the whistle**.

### Final Answer:
The part of a whistle that vibrates to produce sound is the **body of the whistle**.

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