Question

which is a strength - training activity?
o sit - ups
o tennis
o hopscotch
o jump roping

Explanation:

Sit - ups target and strengthen abdominal muscles. Tennis is a racket sport focusing on hand - eye coordination and endurance. Hopscotch is a children's game mainly for balance and agility. Jump roping is a cardiovascular exercise for endurance. Only sit - ups are a strength - training activity.

Answer:

sit - ups