All of the following principles of design are shown here except

The principles of design you mentioned include variety, proportion, perspective, and radial balance. However, one of these terms does not fit well with the common principles of design.

- **Variety**: This principle refers to the use of different elements to create visual interest.
- **Proportion**: This principle involves the relationship between different elements in a design, often concerning their size and scale relative to one another.
- **Perspective**: This is typically more related to techniques in drawing and represents a way of depicting three-dimensional space and depth on a flat surface.
- **Radial Balance**: This principle refers to a circular balance where elements radiate from a central point.

Among these, **perspective** is the least aligned with the core principles of design as it is more about representation in art rather than a fundamental design principle like the others listed. You are likely looking for the one that does not belong with the others.