What characteristic defines a crescent floral arrangement?

A crescent floral arrangement is uniquely characterized by its curved shape and asymmetrical design. This style creates a dynamic visual flow and often mimics the natural forms found in nature, such as the arc of a crescent moon. The asymmetry allows for a more organic look, often leading the viewer's eye through the piece in a gentle, fluid manner.

In contrast to other arrangements, a crescent design doesn't adhere to traditional symmetry, which is typically seen in more structured styles like the round or triangular arrangements. Instead, the focus is on creating visual interest and movement. This arrangement also tends to highlight the curves, allowing for a graceful display of flowers and foliage.

The other characteristics provided in the question, such as being symmetrical or dense and heavy, do not align with the defining features of a crescent arrangement. Symmetrical designs prioritize balance and evenness, which contradicts the essence of the crescent's asymmetrical nature. Likewise, while a crescent arrangement can be dense with flowers, its crucial defining feature remains its curving and asymmetrical silhouette.