Which structure provides attachment for the legs to the axial skeleton?

The pelvic girdle is the correct structure that provides attachment for the legs to the axial skeleton. This structure consists of several bones including the ilium, ischium, and pubis, which together form a basin-like shape that supports the weight of the body when sitting and standing. It also anchors the lower limbs (legs) and plays a crucial role in activities such as walking, running, and maintaining balance.

The pelvic girdle connects with the axial skeleton at the sacrum, allowing for a stable support system and facilitating movement. This attachment is important for the distribution of forces while engaging in various activities, as it helps to maintain alignment and stability between the upper part of the body and the legs.

Other options do not serve this function. The pectoral girdle primarily connects the upper limbs (arms) to the axial skeleton and does not interact with the legs. The axial skeleton itself consists of the skull, vertebral column, and rib cage, which does not include any structures for leg attachment. The appendicular skeleton encompasses both the pectoral and pelvic girdles as well as the limbs, but it does not specifically denote the point of attachment for the legs to the axial skeleton.