What is needed to generate movement of bones (that are attached via articulations)?
ligament contraction
muscle contraction
cartilage expansion
tendon strain

muscle contraction

Explanation: Muscle contraction is needed to generate movement of bones.

cutting out negative people, changing their diets, exercising, taking off days from work or school, etc

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.