Answer:
I think all of them because using suncreen can have less risk for skin cancer, avoiding tobacco can have less risk for lung cancer, getting enough sleep means we can be energetic and not get sick that much, and eating a healthy diet makes us more healthier.
Explanation:
1: seniors in high school because that is when everyone is wanting to be the most popular.
2: ????
3:???
Answer:With this system, blood always flows in only one direction inside the heart. There are also valves at the bottom of the large arteries that carry blood away from the heart: the aorta and the pulmonary artery. These valves keep the blood from flowing backward into the heart once it has been pumped out.
Explanation: