Which of the following is true about vigorous intensity movements?

playing singles tennis or riding a bike on a hilly surface

playing soccer or riding a bike on a flat surface

playing doubles tennis or playing basketball

all of the above

All of the above

Explanation:

Vigorous intensity movements are movements done with large amount of effort. All the activities given namely :

playing singles tennis or riding a bike on a hilly surface  

playing soccer or riding a bike on a flat surface

playing doubles tennis or playing basketball

needs large amount of effort to be accomplished.

exercising at a moderate intensity, and slowly increasing the duration.