Frequency of sound is lowest for

Options

A. man
B. woman
C. young boy
D. young girl

Explanation

To solve the question "Frequency of sound is lowest for", we need to analyze the options provided and understand the relationship between frequency and pitch.

### Step-by-Step Solution:

1. **Understanding Frequency and Pitch**:
- Frequency refers to the number of vibrations or cycles per second of a sound wave, measured in Hertz (Hz).
- Pitch is the perceived frequency of a sound; higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches.

2. **Analyzing the Options**:
- **Option 1: Man**: Generally, men have a lower pitch compared to women and children due to their vocal cord structure.
- **Option 2: Woman**: Women typically have a higher pitch than men because of shorter and thinner vocal cords.
- **Option 3: Young Boy**: Young boys also have a higher pitch than men as their vocal cords are still developing.
- **Option 4: Young Girl**: Young girls usually have the highest pitch among the options due to their smaller vocal cords.

3. **Comparing the Pitches**:
- From the analysis, it is clear that men have the lowest pitch compared to women, young boys, and young girls.
- Since pitch is directly proportional to frequency, the lowest pitch corresponds to the lowest frequency.

4. **Conclusion**:
- Therefore, the frequency of sound is lowest for **Option 1: Man**.

### Final Answer:
The frequency of sound is lowest for **Option 1: Man**.

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