It appears that you are asking about principles of design, and you've listed four options: variety, proportion, perspective, and radial balance. Based on your question, it seems that you need to identify which principle is not shown in a particular context or example (though the example itself isn't provided here).
Among these principles:
- Variety refers to using different elements to create interest.
- Proportion involves the size relationship between elements.
- Perspective pertains to the representation of depth and space in art.
- Radial balance is a type of balance where elements radiate from a center point.
If you need to identify which principle is not shown in your reference materials, you'll have to compare each one to what is presented to you. If you have access to that material, you can look for the visual or contextual representation of each principle to determine which one is missing.
If you'd like to provide more context or details about what you're referring to, I can help you identify the correct answer!