Final answer:
The components necessary for the proper function of the lower back include the abdominal muscles, erector spinae, and pelvic floor, which all contribute to stabilization and posture.
Step-by-step explanation:
For proper function of the lower back, all components of the spinal stabilization system must work together. These components include abdominal muscles, erector spinae, and pelvic floor. These groups of muscles contribute significantly to the stability and posture of the body. The erector spinae aids in postural support and the abdominal muscles such as the rectus abdominis, external oblique, internal oblique, and transversus abdominis play essential roles in stabilizing the anterolateral abdominal wall. Lastly, the pelvic floor muscles provide foundational support for the lower organs and also contribute to the stability of the lower back.