Correct Response: C. Inertia is the resistance to changes in motion. Inertia is proportional to the mass of the body, hence, the bigger the mass or larger the body size, the greater its resistance to being moved. An individual with a larger body type tends to have greater stability than an individual with a slighter body type. The force that can be produced by the muscles of larger body segments (A) or by larger muscles (B) would be more relevant to creating power or movement rather than stability. The principle of equilibrium (D) is equally applicable to individuals of all body builds.