Fear is an often-used but poorly understood concept. How can we understand fear if we cannot define it? Fear can be defined as a learned, involuntary, and natural human emotion elicited by imminent danger. Fear has both cognitive and order assignment papers. It is also often associated with arousal or stress. People who are scared tend to have an increased heart rate and respiration. They may sweat and their face might turn pale. Fear is a basic mechanism that is utilized to protect the body from harm via fight-or-flight responses and it is important for survival.