Which design concept consists of clusters of flowers and foliage that enhance the element of line?

The concept that consists of clusters of flowers and foliage enhancing the element of line is the parallel design. In this design style, flowers and foliage are arranged in a linear fashion, creating a sense of movement and rhythm through the use of parallel lines. This technique often involves placing the floral elements in a way that draws the eye along a specific path, emphasizing the visual flow of the arrangement.

The use of clusters not only adds visual interest but also reinforces the clean lines of the design. This approach allows florists to showcase the beauty of individual flowers while also creating a cohesive and structured look. The focus on line in the parallel design is key to its aesthetic, as it guides the viewer's eyes across the composition, making it an elegant choice for floral arrangements aimed at highlighting form and design.

Other design concepts like cascade design, focal point, and symmetrical design have different priorities and structures that do not primarily emphasize the linear aspect with clusters in the same way, making parallel design unique in its focus on this element.