Which method primarily focuses on the arrangement and grouping of elements for visual appeal?

The choice of design principles as the correct answer highlights the foundational concepts that govern how elements are organized to create visually appealing compositions. Design principles encompass a variety of concepts, such as balance, contrast, emphasis, movement, pattern, rhythm, and unity. These principles guide florists and designers in arranging flowers and other elements in a way that is aesthetically pleasing and effective in conveying a particular message or mood.

By applying design principles, a florist can create arrangements that not only look good but also draw the viewer's eye and communicate the intended emotions or themes. This method is essential for achieving harmony and beauty in floral design, ensuring that all components work well together rather than appearing disjointed.

While color theory deals specifically with the use of color to evoke emotions and set a mood, it is just one aspect of design. Natural arrangements focus on a more organic look that reflects nature, and eco-friendly design emphasizes sustainability and environmentally conscious methods. While these aspects are important, they do not primarily focus on the overall arrangement and grouping of design elements in the way that design principles do.