Usually teens should get 13 hours of sleep eat healthy exercise regularly
Answer:
a, b, c
Explanation:
the last option is explaining a positive effect.
I am pretty confident that the answer is D) mouthpieces for breathing. This is the only way they can stay underwater for long periods of time. If they came up every 10 seconds for breath, they would waste a lot of time.
I hope I helped you!
B. patient-centered interview