Jake will reduce his stamina and energy levels. After changing surfing for computer gaming.
Stamina is the ability to perform physical activity for long periods. It is created by exercising and performing physical activities, it is a certain grade of resistance that allows people to not faint and be able of pursuing the physicak tasks they want to perform. So, when Jake decided that he was going to replace surfing with computer gaming he propiciated that his body was not going to perform physical activities and lose his stamina as consquence.
the answer is b ) square root of 5