Design repeats are methods used to systematically arrange and duplicate elements or motifs across a surface to create a pattern. Common examples include techniques used in textiles, graphics, and other visual arts.
Proportion refers to the relative size and scale of different elements within a design or composition. It's a fundamental principle of design concerned with harmony and balance, not a technique for repeating a specific motif or element across a surface. While proportion is crucial in designing effective repeats, it is not a repeat type itself.
Therefore, Proportion is the correct answer as it is a design principle, unlike Half Drop, Mirror, and Brick, which are specific methods of creating pattern repeats.