He may be wondering where he’s sitting, which of his friends may be in the class, if the teacher is nice or not, if he left any supplies at home, the list goes on and on.
Answer:
Asthma
Reason why is because , if you look up the sympyoms to all of those bronchial airway only fits with asthma.
In this story, "My sister's keeper", the main character Anna, is the keeper because she must donate organs and blood to her sister to keep her alive.
