What is a key role of the nervous system?

The key role of the nervous system is to coordinate and control body activities. It accomplishes this through a complex network of neurons that transmit signals between different parts of the body. This allows for communication between the brain, spinal cord, and peripheral nervous system, enabling the body to respond to stimuli, regulate functions, and perform tasks effectively. The nervous system integrates sensory information and orchestrates responses, which is essential for maintaining homeostasis and ensuring that physiological processes occur in harmony.

Other systems in the body handle functions such as thermoregulation, protection of organs, and waste elimination, but the primary function of the nervous system is its central role in regulation and coordination of activities, making option B the correct choice.