What primary purpose does a bow serve in floral arrangements?

A bow in floral arrangements primarily serves to tie the components together visually. This visual connection helps to unify the various elements of the arrangement, creating a cohesive look that enhances the overall design. By drawing the eye, the bow can highlight key aspects of the arrangement, ensuring that the viewer's attention is directed appropriately.

Other options, while applicable in different contexts, don't encapsulate the primary role of a bow. For instance, adding color variety can be achieved through the choice of flowers and foliage without the need for a bow. Similarly, while a bow might mark an occasion, this is more of a secondary effect rather than its main purpose. Identifying the theme is also important, but that is typically expressed through flower selection, arrangement style, and colors rather than through a bow alone. Therefore, the primary purpose of a bow is indeed to visually unify the entire arrangement.