Which design element involves using multiple similar features to create unity?

The design element that involves using multiple similar features to create unity is repetition. Repetition in floral design refers to the intentional use of the same or similar materials, colors, shapes, or patterns throughout an arrangement. This technique helps to establish a cohesive look, making the composition feel harmonious and unified. By repeating certain elements, designers can guide the viewer's eye and reinforce particular themes or colors within the arrangement, effectively communicating the intended message or aesthetic.

In contrast, contrast emphasizes differences, often involving opposite elements to create visual interest, rather than unity. A focal point focuses on a specific area or object within the design to draw attention, serving a different purpose than repetition. Proportion relates to the size relationships between the different elements in an arrangement and does not directly address the concept of unity through similarities.

Therefore, repetition plays a crucial role in enhancing the overall unity of a floral design by ensuring that similar features are consistently used throughout the arrangement, creating a balanced and aesthetically pleasing result.