Final answer:
In art, banks are often balanced symmetrically to create a sense of stability and conservatism.
Step-by-step explanation:
Symmetrical balance is the most visually stable, and characterized by an exact—or nearly exact—compositional design on either (or both) sides of the horizontal or vertical axis of the picture plane. Symmetrical compositions are usually dominated by a central anchoring element. Asymmetrical balance is created when two sides of an image do not mirror each other, but still have approximately the same visual weight, the same amount of detail or shapes or color, and so on. Radial balance suggests movement from the center of a composition towards the outer edge or vice versa, and is another form of symmetry offering stability with a point of focus at the center.