Answer:According to the concept of selective optimization with compensation, Ronald is adapting his behavior as he ages by selecting and prioritizing certain activities, optimizing his performance in those activities, and compensating for the reduced capacity in others. In his younger days, Ronald had the ability and energy to run in numerous 5k races within a 60-mile radius. However, as he gets older and his physical capabilities decline, he adjusts his approach. By running only one 5k race a month, he focuses on maintaining his participation in the activity he enjoys while conserving his energy and allowing for recovery time. This way, Ronald compensates for his reduced capacity while still engaging in the activity he values.