Here's why:

* Kinetic Energy: This is the energy of motion. The faster an object moves, the more kinetic energy it has.

* Potential Energy: This is stored energy due to an object's position. At the top of a ramp or hill, the skater has more potential energy.

* Conversion: As the skater descends, potential energy is converted into kinetic energy. At the bottom, all the potential energy has been converted into kinetic energy, resulting in the highest speed and therefore the most kinetic energy.