Final answer:
Georgia O'Keeffe was dissatisfied with the traditional art methods at the Art Students League in New York and was inspired by Arthur Dow to pursue a more expressive and abstract style.
Step-by-step explanation:
Georgia O'Keeffe left the Art Students League in New York because she felt constrained by the traditional art methods being taught. Influenced by Arthur Dow, O'Keeffe was drawn to the idea that art should be expressive and compose harmonious lines, mass, and colors. Upon moving to New York and immersing herself in Dow's innovative approach, O'Keeffe developed her distinctive style, which led to abstractions that expressed her feelings rather than conforming to established artistic norms. Her unique vision steered away from imitative realism and towards a way that would give her a significant place in American modernism and abstraction.