The portion of the spine responsible for the lower back is the lumbar spine.

• A. Cervical spine
• B. Thoracic spine
• C. Lumbar spine
• D. Sacral spine

Answer: (C)

The part of the spine that handles the lower back is the lumbar region. The spine is organized into cervical (neck), thoracic (mid-back), lumbar (lower back), and sacral (pelvic) sections. The lumbar region, typically made up of five vertebrae (L1–L5), bears most of the body's weight and enables essential movements like bending and lifting, making it the area people refer to when they talk about the lower back. The other regions serve different areas: cervical in the neck, thoracic in the upper/mid back with rib attachments, and sacral at the pelvis. So, the statement identifying the lumbar spine as the lower back region is correct.