If I were the nurse in this scenario, I would probably go over a lot of key parts of development and how they work. Also, say that most if not all developmental phases are painless, which may help her worriedness. Hope this helps! :)
Answer: During Puberty
Explanation: Once puberty begins, the body starts to produce different chemicals that activate the testes to make testosterone and the ovaries to produce estrogen.
Most likely caused by fears he’s scared she’s going to be more important than him and he’s jealous
Practical skills such as good hand-eye co-ordination, fine coordination and visuo-spatial awareness
excellent vision
good organisational and communication skills
the ability to lead and manage a team effectively
stamina to cope with a busy an demanding role
the ability to inspire confidence in others