What type of arrangement is commonly known for its structured and organized appearance?

Symmetrical arrangements are characterized by their balanced and structured design, where elements are arranged equally on either side of a central axis. This creates a sense of harmony and proportion, making the arrangement visually appealing and easy to appreciate. The predictable and orderly nature of symmetrical arrangements is often used in formal floral designs, as they convey elegance and sophistication.

In contrast, loose bouquets, asymmetrical arrangements, and wild arrangements tend to focus on more organic shapes or a relaxed and casual style. These options emphasize movement or a more freeform approach to design, which lacks the rigid structure that defines a symmetrical arrangement. Therefore, the defining trait of a symmetrical arrangement is its organized and structured appearance, making it the correct answer.