To improve her lifestyle, a teen gave up smoking.
or
To improve her lifestyle, a teen chose to give up smoking.
Answer: Monitoring your heart rate is important, because it reflects your overall health. The lower the heart rate the better, but obvisouly it can't go past a certain point. It shows basic body function and general fitness. It can indicate any abnormalities or health issues.
No, i also worry about school .. that’s why i downloaded this app, but it good at math.
Answer:
Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease.