What is the name of the basin-shaped structure that supports the spine?

The pelvis is the correct answer as it serves as the basin-shaped structure that supports the spine. This anatomical region connects the trunk to the lower limbs and plays a critical role in weight-bearing and movement. The pelvis consists of several bones, including the ilium, ischium, and pubis, and it provides a stable base for the vertebral column, allowing for the transfer of load from the upper body to the legs. It is also essential for various functions such as locomotion, stability during standing, and protection of pelvic organs.

The term "pelvis major" generally refers to a larger component of the pelvic cavity but is not specifically recognized as a separate structure supporting the spine. The sacrum, which is part of the spine, lies at the back of the pelvis and helps connect the spine to the pelvic girdle but does not encompass the full supportive role that the entire pelvis provides. The clavicle, on the other hand, is not related to the spine's support; it connects the arm to the body and does not form part of the structure that bears weight or stabilizes the spine.