Questions: Deep voice Narrow hips Broad shoulders Low basal metabolism Decreased bone strength

The secondary sex characteristics that develop in males after puberty include:

1. Deep voice: The answer is correct. During puberty, the larynx grows and the vocal cords lengthen, resulting in a deeper voice.

2. Narrow hips: This is not a secondary sex characteristic that develops after puberty. Males typically have narrower hips compared to females, but this is not a change that occurs due to puberty.

3. Broad shoulders: The answer is correct. During puberty, males often experience an increase in muscle mass and changes in body structure, including broader shoulders.

4. Low basal metabolism: This is incorrect. Puberty does not cause a decrease in basal metabolism; in fact, metabolism can increase due to growth and increased muscle mass.

5. Decreased bone strength: This is incorrect. During puberty, males typically experience an increase in bone density and strength, not a decrease.

In summary, the secondary sex characteristics that develop in males after puberty are a deep voice and broad shoulders.