Final answer:
The three key elements of art used in Opie's art are Line, Color, and Shape, which are crafted to create optical illusions that play with perception and appear dynamic to viewers.
Step-by-step explanation:
The three elements of art most strongly used in Opie's art are Line, Color, and Shape. When observing Op Art, these elements are manipulated to create optical illusions. Lines are used to establish patterns that make flat surfaces appear to undulate or have volume.
Color is applied in various ways; some Op Art employs black and white to create stark contrasts, while other pieces use bright, contrasting colors to enhance the illusion of movement. Shapes in Op Art are often geometric and are placed in precise, calculated arrangements that play on the viewer's perception, creating a sense of depth and motion. Op Art artists deliberately use elements to engage viewers in a dynamic visual experience where static images appear to move or change as the viewer's perspective shifts.