C. Direction
Hope this help.
When I researched this question it kept brining up the Elbow Joint.
Most energy is found in the chemical bonds of ATP
<span>Ecological balance can be defined as the equilibrium or stability of species
(animals and plants) to natural conditions or environment. A decrease in the
variety or diversity of, environment or those natural conditions which may
result in an imbalance or instability of the ecological balance means a
reduction in biodiversity.</span>
