B.
A is false because then the younger you are the higher your heart rate.
C is false because heart rate must be a whole number.
D is obviously wrong.
Minerals :) Have a great day!
Answer:
When you are exercising, your muscles need extra oxygen some three times as much as resting muscles.
This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing
Body mass index (BMI) is a measure of body weight relative to height.
BMI is basically a calculation of a person's weight/height and has categories that informs you if you are overweight, underweight, or at a normal weight.
