The big five personality traits are present in highly varying degrees throughout much of adulthood first become obvious in preschool children apply only to people living in north america are apparent in every culture and era

The big five personality traits are apparent in every culture and era
Eventhough the traits apparent in every culture, the dominant traits that exist in every culture are different.
For example, the American culture value extraverted trait while people in East Asia (like Japan and South Korea) valued calm and collected (introverted) trait.

Ibelieve the answer is water and oil.