Final answer:
The concept relevant to a skier gliding along a frictionless snow incline is Conservation of Energy.
Step-by-step explanation:
The subject of this question is Physics. When a skier is gliding along a frictionless snow incline, the relevant concept is Conservation of Energy. In this scenario, the skier's potential energy is converted into kinetic energy as they slide down the slope. The conservation of energy principle states that the total mechanical energy (the sum of potential and kinetic energy) remains constant throughout the skier's motion.