What part of the nervous system is essential for it to work properly?

we would need to see the picture to answer it

did you fail the test? xd

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.