What type of balance uses unequal visual elements to create a visually interesting layout?

Asymmetrical balance is the correct choice because it involves arranging elements of different weights and sizes to create a sense of harmony without mirroring each side. This type of balance is often more dynamic and visually engaging, as it allows for creative arrangements that can draw the viewer's eye to various focal points within the design. By using unequal visual elements strategically, designers can create tension and variety, leading to a layout that feels more organic and less rigid.

In contrast, symmetrical balance relies on equal visual weight distributed evenly around a central axis, resulting in a more formal and traditional look. Radial balance organizes elements around a central point, effectively creating a circular flow of visual activity, which differs from the uneven composition of asymmetrical balance. Horizontal balance, while focusing on a balanced appearance across a horizontal plane, does not capture the essence of using varying weights and sizes to evoke interest in the same way as asymmetrical balance does.