Answer: because gas rise in upward
Explanation:
All except the fourth (one therapy for all ages).
<em>This activity is an aerobic activity. This is known as aerobic because this consists of cardio exercises. During these activities, the heart rate and breathing rate will increase. These require free oxygen for a longer time.</em>
<span>Get vaccinated.
<span>Avoid close contact
</span><span>Stay home if you are sick
</span><span>Cover your mouth
</span><span>Wash your hands
</span><span>Avoid touching your nose, eyes, and mouth
</span><span>Practice good health habits
</span><span>Clean and disinfect</span></span>
I'd say 13-14 years of age... usually when kids are starting high school
