Final answer:
The characteristic that distinguishes interneurons from other neurons in the nervous system is their function.
Step-by-step explanation:
Interneurons are distinguished from other neurons in the nervous system based on their function. Interneurons serve as connector neurons that facilitate communication between sensory neurons and motor neurons. Unlike sensory neurons, which transmit information from sensory receptors to the central nervous system, and motor neurons, which transmit information from the central nervous system to muscles or glands, interneurons function within the central nervous system to relay and process information.