Final answer:
The pain message from Sandy's scalded toe to her spinal cord was carried by the somatic nervous system, a division of the peripheral nervous system responsible for sensory and motor information.
Step-by-step explanation:
When Sandy scalded her toe in a tub of hot water, the pain message was carried to her spinal cord by the peripheral nervous system. Specifically, this task is managed by the somatic nervous system, which is a division within the peripheral nervous system.
The somatic nervous system is responsible for transmitting sensory and motor information to and from the skin, muscles, and sensory organs. In Sandy's case, the sensory receptors in her skin detected the extreme temperature causing a signal via the sensory nerve fibers to the spinal cord, provoking a reflex response to pull away and avoid further damage.