A

Step 1: Understand that when an object moves in a circle, it requires a centripetal force to keep it on that circular path. This force is directed towards the center of the circle.
Step 2: In the case of a skater, the centripetal force comes from the friction between the skates and the ice. When the skater leans towards the center, the distribution of weight and the frictional force provide the necessary centripetal force for circular motion.
Step 3: Analyze the forces acting on the skater. The weight of the skater acts vertically downward, and the normal force acts perpendicular to the surface of the ice. The frictional force, which acts towards the center of the circle, is the primary source of centripetal force in this scenario.
Conclusion: Therefore, in this context, the correct answer is that the centripetal force is sourced from the friction between the skater's skates and the ice.