The elements on the page radiate/swirl in a circular path.
Radial Balance in the Real World
This picture emphasizes Radial Balance because the lines shooting from the center emphasize the design in the middle, making it the focal point
This design shows the layers that the picture has by keeping the design consistent but swirling/radiating from the center.
This picture shows the photographical application of radial balance as the photographer takes a photo of a blood orange showing radial balance. The lines in the fruit shoot from the focal center, drawing attention and displaying photographical beauty.