The correct answer is industry. An industry is the first alternation of natural resources as the industry utilizes the artificial sources or man made materials for production of energy, utility products and services. The industry can reduce the dependency on natural resources and can lead to their sustainable use for the present as well as for future generation
Potential energy is gaining all the way to the top of the hill due to the increase of height (gravitational pull) on the skateboarder. At the top of the hill potential energy will reach its highest point. Then going down kinetic energy increases as potential energy decreases.
