The first reaction of the body to a cut is to restore the continuity ?

the answer is g1

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.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.