I think it would be B because it is very true that kids don't get out an do activity really at all
Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Explanation:
you should exercise at the morning everyday but don't push yourself if you can't do it.Eat vegetables if you don't want to be fat.Because vegetables are nutritious And can help us to be healthy..
I think the answer would be C).