Final answer:
The best explanation for the higher kinetic energy in running compared to walking is that running typically involves a higher velocity, and kinetic energy increases with the square of the velocity. This means a person running will have substantially more kinetic energy than they would if they were walking.
Step-by-step explanation:
The statement that best explains why the kinetic energy of a person who is running is generally more than a person who is walking is A. Running involves more force and effort, leading to greater kinetic energy. Kinetic energy is the energy associated with the motion of an object, and the amount of kinetic energy an object has depends on its mass and the square of its velocity. Therefore, since running involves a higher speed than walking, the runner will have more kinetic energy. For example, a car at 100 km/h has four times the kinetic energy of the same car traveling at 50 km/h. This applies to running and walking as well, as running typically involves a greater speed than walking. Additionally, potential energy is converted into kinetic energy as the person moves and exerts effort to increase their speed.