The right answer is <span>Rudolf Virchow!
Hope that helped. :)</span>
Answer:
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.
Explanation:
The answer is Cell Membranes.
