Pitch of the voice is lower in males than females
as the vocal cords of man are

Options

A. Thicker and longer
B. Thinner and longer
C. Thicker and shorter
D. Thinner and shorter

Answer

### Step-by-Step Solution:

1. **Understanding Voice Pitch**: The pitch of a voice is determined by the frequency of sound waves produced when air passes through the vocal cords. Higher frequency results in a higher pitch, while lower frequency results in a lower pitch.

2. **Vocal Cord Structure**: The structure of the vocal cords plays a crucial role in determining the pitch. In males, the vocal cords are generally thicker and longer compared to those in females.

3. **Effect of Vocal Cord Thickness and Length**:
- **Thicker Vocal Cords**: Thicker vocal cords vibrate more slowly when air passes through them, resulting in a lower frequency sound, which corresponds to a lower pitch.
- **Longer Vocal Cords**: Longer vocal cords also contribute to a lower pitch because they can produce lower frequency vibrations.

4. **Comparison with Female Vocal Cords**: In contrast, female vocal cords are thinner and shorter, which allows them to vibrate more quickly. This results in a higher frequency sound and, consequently, a higher pitch.

5. **Conclusion**: Therefore, the reason why the pitch of the voice is lower in males than in females is that the vocal cords of males are **thicker and longer**.

### Final Answer:
The vocal cords of males are **thicker and longer**.

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