Answer: TEMPERAMENT
Explanation: TEMPERAMENT is a term used in Psychology, is a constant Behavior of an individual that is biologically connected. TEMPERAMENT is not affected by learning,peer group, environment etc. It is also an inheritable trait, TEMPERAMENT can also be defined as a person's habitual response to certain stimuli ,it is classified into four(SANGUINE, CHOLERIC, MELANCHOLIC, PHLEGMATIC).