Current physical activity guidelines recommend that children and adolescents do at least 60 minutes of activity each day.
Whether it be muscle strengthening, aerobic activity, or other strengthening techniques, children and adolescents should do at least 60 minutes of activity each day. Getting your heart to beat faster when playing or exercising is good for your body and if you do it long enough, you'll be able to play/exercise longer due to the fact that you will not get wore out faster.
The answer is A because when they are a adult
In my personal experience In order to stay fit I do ballet and tennis. Those two things have helped me stay healthy and fit as well as creating hobbies! I also want to mention that I take vitamin supplements just in case if I am not for filling my normal vitamin intake from foods. So for example I take some vitamin C powder! I think it’s extremely important to work on your health and your physical activity because later in life all these things will affect you in a positive way so you won’t have to worry too much of your health considering the fact that you have been working on your health for the past years. I’ve also read that eating healthy can help you age backwards so you’ll look much younger at the age of 50 then you would if you didn’t take care of yourself physically. <3 have a great day