Kingdoms are classified into three Domains and into one of the six kingdoms of life.
A. Immune system
It helps our bodies fight everything that comes in our path.
The correct answer is Psychoneuroimmunology.
Psychoneuroimmunology is known as the the study of the interplays among the psychological processes and the apprehensive and immune structures of the human body. The main goals of the study are the interactions among the nervous and immune structures and the relationships among mental procedures and fitness.
