What might be a defining feature of an arrangement using mass flowers?

An arrangement using mass flowers is characterized by the use of large quantities of a single type of flower. This technique emphasizes volume and impact, creating a bold and cohesive design. The focus on one type of flower allows for a strong visual presence and can enhance the overall aesthetics of the arrangement, drawing the viewer's attention to the beauty and form of that particular flower.

In contrast, delicate structures often refer to floral arrangements that incorporate more fragile blooms or intricate designs, which do not align with the robust nature of mass flower arrangements. Varied color palettes typically involve the use of multiple types of flowers to create visual interest through diversity, which is not the characteristic of a mass flower arrangement focused on uniformity. Lastly, tall, upright designs can sometimes be a feature of certain styles of floral arrangements but are not exclusive to mass flower designs, which can also be low and full depending on the desired effect.