What metaphor did Plato use to describe the struggle between passion and reason?

A) an architect designing a complex structure
B) a chariot driver guiding two horses
C) a bull and an ox pulling in opposite directions
D) a still lake disrupted by ripples from a stone

Plato used the metaphor of a chariot driver guiding two horses to describe the struggle between passion and reason. The chariot driver represents reason, while the two horses represent the two kinds of passions or desires within us – the white horse symbolizing noble passions like ambition and the black horse symbolizing base desires like greed and lust. The struggle between reason and passion is like the struggle between the chariot driver and the two horses trying to pull in different directions.