Answer:
Based on the change described, where Alex replaces one hour of playing video games with an hour of running, we can predict the following result:
B. An increase in his energy level and an increase in his stamina.
This prediction is based on the fact that engaging in physical activity such as running can lead to improved energy levels and increased stamina over time. Additionally, replacing sedentary activities like video gaming with physical exercise tends to have positive effects on overall health and fitness.
Explanation: