Which group of vertebrae connects to the ribs?

The thoracic region of the vertebral column is the correct answer because it consists of twelve vertebrae (T1 to T12) that specifically articulate with the ribs to form the rib cage. This connection is crucial for protecting vital organs such as the heart and lungs, and it plays a significant role in respiration by allowing movement of the rib cage during inhalation and exhalation.

In contrast, the cervical region encompasses seven vertebrae in the neck that support the head, while the lumbar region consists of five larger vertebrae in the lower back that bear the most weight and are adapted for movement and support. The sacrum, formed by five fused vertebrae, connects the spine to the pelvis and does not articulate with the ribs at all. Each of these regions has distinct anatomical roles, but only the thoracic region is involved in rib connection.