How do the muscles in the human body with movement?
a.
they squeeze the bones.
b.
they cause bones to bend.
c.
they push bones apart through ligaments.
d.
muscles contract and thus pull on bones to cause movement.
my guess is d ps idk what subject this is

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.