What must skeletal muscles do to move? a. engage their fibers slowly b. twitch involuntarily c. separate from the bone d. contract and relax

It is attached to both the bones on either side of the joint by strong cords called tendons. A tendon is a tough band of connective tissue that connects a muscle to a bone. Tendons are similar to ligaments, except that ligaments join bones to each other. Muscles move the body by contracting against the skeleton. so im pretty sure the answer is D

The correct answer is "grounded".