Not sure if you had choices so as to make your answer more specific to the question being posed, but in general, hand hygiene and proper infection control measures should be taken and taught.
In an asthma attack, people have difficulties to breathe becuase the airway is reduced, the lungs excrete mucus, etc.
Answer:

Hope it helped,
Happy homework/ study/ exam!
C stress isn't good for you... It can raise blood pressure which is harmful
The main reason Americans are eager for new goods and servises is because of economic growth.
Hello,
The answer would be about "8-9 hours of sleep per day".
Reason:
At that age the body is growing therefore the body would need more energy to grow so thats why the amount of sleep would increase because adults, and teenagers would be into more physical activities and work that would drain his or her energy therefore they should get to 8-9 hours of sleep in order to last the person the whole day.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit