Final answer:
The combining form for where spinal nerves emerge from the spinal cord is 'Radiculo-'.
Step-by-step explanation:
The combining form for the term that refers to where each of the 31 pairs of spinal nerves emerge from the spinal cord is d) Radiculo-. These spinal nerves are each connected to a specific segment of the spinal cord, and they branch out to communicate signals to and from various parts of the body. Sensory axons enter the spinal cord as the dorsal nerve root, and motor axons, both somatic and autonomic, emerge as the ventral nerve root from the anterior or lateral horns of the spinal cord.