The correct answer would be - Autonomic nervous system.
Explanation:
The autonomic nervous system is the control unit or system of the body that acts unconsciously and regulates many body functions such as digestion, urination, respiratory rate, and sexual arousal and other functions.
In danger autonomic nervous system order the adrenal glands to release hormones like epinephrine and norepinephrine which provides energy to respond and act accordingly.
Thus, the correct answer is - Autonomic nervous system.
