Answer: The sympathetic nervous system.
Step-by-step explanation:
The sympathetic nervous system control the heart rate, blood pressure, and perspiration. It is active ll the time though it varies with the environmental changes.
It is especially prepares the body for the flight and fight phenomenon.The graph measure the activity of the sympathetic branch which is then used to identify whether the person is lying or not.
so, the person must work more towards the sympathetic nervous system.