Out of human males and females, the human _____ experience an increase in muscle mass at the time of puberty.

Options

A. Female
B. Males
C. Both of them
D. None of them

Answer

**Step-by-Step Solution:**

1. **Understanding Puberty**: Puberty is a developmental stage where individuals undergo various physical changes as they transition from childhood to adulthood. This stage is marked by hormonal changes that lead to the development of secondary sexual characteristics.

2. **Identifying Changes in Males and Females**: During puberty, both males and females experience physical changes. However, the nature of these changes differs between the sexes.

3. **Muscle Mass Increase**: In males, one of the significant changes during puberty is an increase in muscle mass. This is largely due to higher levels of testosterone, which promotes muscle growth and strength.

4. **Changes in Females**: In contrast, females experience different changes during puberty, such as the development of breast tissue and changes in body fat distribution, rather than a significant increase in muscle mass.

5. **Conclusion**: Based on the above points, it is clear that among human males and females, it is the males who experience a notable increase in muscle mass during puberty.

**Final Answer**: The human males experience an increase in muscle mass at the time of puberty.

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