Answer:
inborn, genetically based personality differences
Explanation:
Temperament is the combination of innate traits we inherit from our parents that unconsciously affect our behavior. In other words, temperament corresponds to genetically and innate personality differences
It is the temperament that makes the person extrovert or introvert, that makes one person interested in sport and another in music and art. Temperament influences all our actions, from sleep habits, to study, and even to the way we live daily or relate to or communicate with other people.