What is characterized by similar imagery on both sides of a central axis?

The concept characterized by similar imagery on both sides of a central axis is best described by approximate symmetrical composition. This type of composition involves elements that mirror each other in a balanced manner around a central line, yet they can differ slightly to create visual interest. This approach allows for a sense of balance and harmony without being completely rigid in structure.

In art, approximate symmetry is commonly used to draw the viewer's eye towards the central point while still providing variation that keeps the composition engaging. This can be seen in various art forms, including painting, sculpture, and architecture. The use of approximate symmetry helps to establish a focal point and conveys a sense of stability while allowing for some creative freedom in how the elements are arranged.

Other options in this context do not fit this definition as clearly. Asymmetrical composition refers to a balance achieved through uneven distribution of elements, which contrasts with the idea of similarity on both sides. Radial symmetry involves elements radiating out from a central point, creating a circular pattern rather than mirroring on either side of a straight axis. Fractal design typically represents patterns that repeat at varying scales, which also diverges from the notion of bilateral symmetry.