The artist's work was characterized by its _______ use of colors, creating **vibrant and dynamic** compositions that drew viewers in.
Explanation: The description of the resulting compositions as **'vibrant and dynamic'** suggests a bold, conspicuous, or impressive use of colors. **Ostentatious** means characterized by a conspicuous or showy display, often designed to impress, which aligns with the creation of eye-catching compositions.
