The answer is respiratory and circulatory systems.
I think C. Hopefully I helped, health is not really my forte
<span>Good body composition is attained by eating properly and exercising regularly. A good and healthy body composition varies from person to person. one person maybe taller or heavier than another person maybe shorter and weigh a lot less. But a good body composition depends on your body mass index and it differs from person to person. Good body composition is only obtained by a healthy diet and exercise.</span>
Answer and Explanation:
A resource that can be used to evaluate your statement about the effectiveness of toothpaste is the comparison between the effect it has on teeth, with the effect of an ordinary toothpaste. You could do this by bringing your family members together and separating them into two groups. One group would use regular toothpaste and the other group would use toothpaste which you believe actually whitens your teeth. The groups were to use the same toothpaste for a month and were to take pictures of the teeth each week. These photos would help you compare the whitening effect of toothpaste and thus prove that your toothpaste is efficient in whitening teeth, as it promises.
