Final answer:
The arms, legs, and pelvic girdle are part of the appendicular skeleton, which also includes the pectoral girdle and is distinct from the axial skeleton that forms the body's central axis. The correct option is B.
Step-by-step explanation:
The division of the skeleton that is made up of the arms, legs, and pelvic girdle is called the appendicular skeleton. The appendicular skeleton includes the limb bones, as well as the pectoral and pelvic girdles, which attach the limbs to the axial skeleton.
The axial skeleton, on the other hand, forms the central axis of the body and consists of the skull, vertebral column (including the sacrum and coccyx), and the thoracic cage, which is formed by the ribs and sternum.