Which example best characterizes a sedentary lifestyle?

A sedentary lifestyle is characterized by a lack of regular physical activity and prolonged periods of inactivity. The choice of working out at the gym only once a year highlights infrequent engagement in physical activity, which is a defining feature of a sedentary lifestyle. This infrequent exercise does not provide the consistent movement and physical exertion necessary to promote health benefits or prevent the risks associated with inactivity.

In contrast, the other options describe more active behaviors: jumping rope with friends on Saturdays involves regular social and physical activity; jogging every evening is a consistent form of aerobic exercise; and doing several sit-ups three times a week indicates a commitment to maintaining physical fitness. Therefore, these demonstrate engagement in physical activity rather than a sedentary lifestyle.