Match the type of exercise with each example.
walking drills are .
burn(s) the most calories.
sprinting drills are .
can put a strain on the joints.
during , one foot remains on the ground.
can be a walking drill with a 20 second jog included in it.
jumping in place is a type of .
can be done on the floor.

options are (high impact exercise, low impact exercise, and wind sprints)

Walking drills are low impact exercise.   (One foot is always on the ground)

Wind sprints burn(s) the most calories.  (Constant switches from low to high intensity)

Sprinting drills are high impact exercise  (Both feet are off ground at times)

High impact exercise can put a strain on the joints.  (Weight of whole body impacts joints when landing)

During low impact exercise, one foot remains on the ground.  (About half the weight of body impacts joints an there is more control)

Wind sprints can be a walking drill with a 20 second jog included in it.  (Wind sprints are switching between lower and higher intensity exercises)

Jumping in place is a type of high impact exercise.  (Whole body off ground)

Low impact exercise can be done on the floor.  (Most of body weight is supported)

the answer would be  

c. neighborhood watch

hope this .