Question

practice it
reality - distorting strategy of the ego to prevent awareness of anxiety - evoking or troubling ideas or impulses
metabolic process
defense mechanism
chemical defense
sense organ
immune system

Explanation:

In psychology, defense mechanisms are reality - distorting strategies of the ego. They are used to prevent awareness of anxiety - evoking or troubling ideas or impulses. A metabolic process is related to chemical reactions in the body. Chemical defense is more about substances for protection (like in plants). A sense organ is a physical organ for sensing (e.g., eyes for sight). The immune system is for fighting pathogens.

Answer:

defense mechanism