Which type of flowers are used to establish the outline of a floral arrangement?

The correct answer is skeleton flowers, which serve the purpose of outlining the structure of a floral arrangement. Skeleton flowers are characterized by their strong stems and distinctive shapes that contribute to the overall framework of the design. By providing a defined outline or silhouette, these flowers help to establish the visual boundaries and enhance the arrangement's design.

In floral design, the outline is crucial as it sets the balance and proportion of the entire composition. Skeleton flowers typically include varieties like branches or other structural elements that give the designer a base to work from.

Other types of flowers mentioned serve different roles in floral arrangements. Mass flowers are typically used to fill in the bulk of the arrangement and provide visual weight. Filler flowers add softness and texture, filling voids and enhancing the overall look but do not define the shape. Accent flowers, on the other hand, are included to provide additional color or details and highlight certain aspects of the arrangement, but they do not contribute to establishing the outline.