What is the primary function of filler flowers in floral arrangements?

Filler flowers play a crucial role in floral arrangements primarily by filling gaps and providing volume. These flowers are typically smaller and less visually dominant than focal flowers, which means they complement the overall design without overshadowing the main elements. By incorporating filler flowers, a designer can achieve a fuller, more balanced look in an arrangement, ensuring that it appears lush and visually appealing from all angles.

Filler flowers also help to connect different components of the arrangement, creating a seamless transition between the focal flowers and any greenery or other elements used. This ability to weave through and unify the various parts of an arrangement enhances its structural integrity and aesthetic charm.

While the other choices address aspects of floral design, they do not accurately define the primary role of filler flowers. For instance, focal flowers are intended to serve as the main attraction, while options that suggest replacing main flowers or focusing solely on structure do not represent the unique contribution of fillers to an overall composition.