Pretty sure it’s the pituitary gland.
A teen's resting heart rate is 60 - 100 beats per minute.
D, Trying a new exercise can cause your body to work the wrong way. Exercising too hard can overwhelm your muscles and strain them. Exercising too long can overwork muscles.
Physical health because your eating habit or where your living could greatly influence how your physical well being is.
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I think the answer is A. Hope it helps!!!!!
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