Boys:
-Deepening in Voice
-Growth Spurts
-Pubic Hair Development
-Increased Production of Testosterone and Sperm Cells
Girls:
-Growth Spurts
-Pubic Hair Development
-Menstrual Cycle Begins
-Increased Production of Estrogen and Eggs
Answer:
Maybe test her theory of being allergic to cats or maybe even some of the scents or something from her friends house. She should also consult a doctor to be sure.
Explanation:
B. inhaling and exhaling deeply