Final answer:
During the Geometric period in Greek art, the shift toward an emphasis on symmetry and balance was the major departure from previous stylized and two-dimensional representations, paving the way for more realistic styles.
Step-by-step explanation:
During the Geometric period in Greek art, the most notable characteristic that marked a departure from the stylized and two-dimensional art that led to the development of more realistic styles was option B) Emphasis on symmetry and balance. The Geometric period is recognized for its use of geometric shapes to compose human and animal figures as well as abstract decorations. This emphasis was a fundamental shift towards a style that, over time, inclined towards proportionality and three-dimensionality in artistic depictions. Unlike the bright colors and abstracted elements associated with movements like the Post-Impressionists, or the surrealistic dreamlike imagery of Surrealism, the Geometric period's focus laid the groundwork for subsequent developments in classical Greek art that would eventually lead to naturalistic and highly detailed sculptures and pottery.