Answer to Question 1
Children and adolescents should engage in 60 minutes or more of moderate- to vigorous-intensity aerobic activity (running, hopping, and skipping) daily. Strength-building exercise (hill climbing, weight lifting, and tree climbing) should be included in the 60 minutes three days a week. Bone strengthening exercises (basketball, rope jumping, and tennis) should also be included in the 60 minutes three days a week.
Answer to Question 2
d