Question

to which skeletal system does the sternum belong?
spongy skeleton
compact skeleton
axial skeleton
appendicular skeleton

Explanation:

The human skeletal system is divided into the axial and appendicular skeletons. The axial skeleton consists of the skull, vertebral column, and thoracic cage. The sternum is part of the thoracic cage, which protects vital organs like the heart and lungs. Spongy and compact refer to bone tissue types, not skeletal systems. The appendicular skeleton includes the bones of the limbs and girdles.

Answer:

C. axial skeleton