Question

In addition to muscular endurance, cardiovascular endurance, muscle strength, and flexibility, which other element serves as a marker of one's physical fitness

1) Breathing Capacity
2) hand-eye coordination
3) muscle reflexes
4) Body composition

Answer 1

I believe its D... Body composition. 

Answer 2

The answer would be Body Composition because body composition relates to the amount of tissue (bone, organs, muscle, etc.) and the amount of fat on his or her body.
Hope it helps!