The correct answer is D) A positive, but not linear relationship.
This comes from the equation Ek=1/2mv^2
Where Ek is Kinetic Energy, m is mass, and v is the speed (or velocity).
As we can see in the equation, the relation is not linear but quadratic and it is positive.
No main purpose was fur trading
Explanation:
the most complex energy system is the aerobic or oxygen energy system which provide mass of the body's ATP
