Physical activity is defined as:

a. any type of activity that requires movement

b. the ability to complete activities of daily life

c. planned activity specifically designed increase fitness level

d. the ability to perform specific skills associated with sports

a. any type of activity that requires movement

Physical activity is defined as any type of activity that requires movement. The other responses represents some form of physical activitity, but they do not define what the words actually means. Grocery shop is not a sport nor a planned activity, but it is still a physical activity, so with this example it is possible to deduce that any type of activity that requires movement is a physical activity.