What term refers to the arrangement of elements around an axis producing symmetry?

The term that refers to the arrangement of elements around an axis producing symmetry is "Balance." In architectural design, balance is a fundamental principle that is achieved when elements are arranged in such a way that they create a feeling of stability and harmony. Symmetrical balance involves placing identical or similar elements on either side of a central axis, leading to a sense of order and equality in visual weight.

While contrast, rhythm, and hierarchy are also important concepts in design, they serve different purposes. Contrast deals with the juxtaposition of different elements to create visual interest. Rhythm relates to the repetition of elements and their arrangement in a way that guides the viewer's eye through a space. Hierarchy establishes the order of importance among elements, often directing attention to the most significant features. However, none of these concepts focus specifically on the idea of symmetry that arises from the arrangement of elements around an axis, making "Balance" the correct term in this context.