research on hunam behavior

hunam behavior changes acoording to mood,current satuation,enviornment,weather and the psychy of a person.it varies according to person to person.many people take the things for granted and be happy in any satuation.some one smell and observe the diffrent things quickly and plan accordingly.they remain in nornal condition whereas some one get tense in facing odd satuation and feel embaressed.they get affected by small things and change their behavior quickly.