When mentioning that it is a natural reaction of the body to situations of danger, or that take us out of contexts that we are initially accustomed...

When mentioning that it is a natural reaction of the body to situations of danger, or that take us out of contexts that we are initially accustomed to, what concept are we referring to?


Stress
Panic disorder
Post-Traumatic Stress Disorder
Generalized Anxiety Disorder
Agoraphobia