It is B , I know this thanks to the fact I took PE and our teacher teach us about the body !
<span>Body's ability to endure 20 minutes or more of strenuous, continuous exercise
-with oxygen
-heart becomes stronger and more efficient
-best thing you can do for your body
</span><span>Aerobic exercise</span>
<span><span>Cardiorespiratory endurance
Muscular strength
Muscular endurance
Body composition
Flexibility </span></span>