What principle involves the recurrence of like elements within a composition?

The principle that involves the recurrence of like elements within a composition is known as repetition. Repetition is a fundamental concept in design and composition that contributes to the cohesiveness and unity of a visual arrangement. By repeating certain elements—such as colors, shapes, or lines—designers create a feeling of consistency and familiarity, which can enhance the overall aesthetic of the arrangement.

When elements are repeated, they help to guide the viewer's eye throughout the composition, establishing a rhythm that can lead to a more engaging visual experience. This principle can be particularly effective in floral arrangements, where repeated colors or flower types can create harmony and balance, making the design more appealing.

In contrast, rhythm refers to the movement or flow within a composition, often achieved through the arrangement of repeated elements but distinct from the concept of repetition itself. Emphasis focuses on highlighting a particular element to draw attention, while scale deals with the size relationships between objects in the arrangement. All these principles are valuable in their own right, but repetition specifically centers on the idea of recurrence, making it the correct choice for this question.