Which of the following lists the three natural curves of the spine?

The correct list of the three natural curves of the spine comprises the cervical, thoracic, and lumbar regions. These curves are essential for maintaining proper posture and distributing mechanical stress during movement and activity.

The cervical curve, located at the neck, allows for the flexible movement of the head while supporting its weight. The thoracic curve, found in the upper back, provides stability and helps to protect vital organs in the chest. Lastly, the lumbar curve supports the lower back, bearing much of the body's weight and allowing for a great deal of movement and flexibility.

Understanding these curves is crucial for aquatic fitness professionals as they work with clients in the water. Awareness of spinal alignment and how these natural curves function can help in designing safe and effective exercise programs that promote spinal health and reduce injury risk.