Final answer:
The sacral plexus traverses along vertebral levels S1-S4, and from it arises the sciatic nerve, the largest nerve in the body.
Step-by-step explanation:
The sacral plexus is an important structure involving the nerves that serve the pelvic area and lower limbs. Specifically, the sacral plexus originates from the lower lumbar nerves L4 and L5 and the sacral nerves S1 to S4. Consequently, the correct answer to the question,"The Sacral plexus traverses along which vertebral levels?" would be Option A: S1-S4. This plexus is crucial as from it arises the largest nerve in the body, the sciatic nerve, known to be associated with the condition sciatica. The sciatic nerve extends from the hip joint and down the leg, illustrating the reach and importance of the sacral plexus.