The dramatic changes in body features associated with puberty are mainly because of the secretions of :
A.Thyroxine B.Estrogen C.Adrenaline D.Testosterone

Options

A. A and B
B. B and C
C. A and C
D. B and D

Answer

To answer the question regarding the dramatic changes in body features associated with puberty, we will analyze the options provided:

1. **Understanding Puberty**:
- Puberty is the stage in life when a person becomes sexually mature. It involves various physical and hormonal changes that lead to the development of secondary sexual characteristics.

2. **Analyzing the Options**:
- **A. Thyroxine**: This hormone is primarily responsible for regulating metabolism in the body. It does not play a direct role in the changes associated with puberty. Hence, this option is incorrect.
- **B. Estrogen**: This is a female sex hormone that plays a crucial role in the development of secondary sexual characteristics in females, such as breast development and the regulation of the menstrual cycle. Therefore, this option is correct.
- **C. Adrenaline**: This hormone is involved in the body's fight-or-flight response and does not have a direct role in sexual maturity or the changes seen during puberty. Thus, this option is incorrect.
- **D. Testosterone**: This is a male sex hormone responsible for the development of male secondary sexual characteristics, such as increased muscle mass, body hair, and voice changes. This option is also correct.

3. **Conclusion**:
- Since both Estrogen and Testosterone are responsible for the dramatic changes in body features associated with puberty, the correct answer to the question is both B (Estrogen) and D (Testosterone). However, if we are to choose one option that represents the main changes in males, D (Testosterone) would be the most relevant choice.

**Final Answer**: D. Testosterone

---