Which feature is typical of knotted or cut pile weaves?

The characteristic of knotted or cut pile weaves primarily revolves around the way they create texture and depth in flooring or upholstery materials. These weaves consist of tufts of yarn that are either tied into knots (in cut pile) or left as loops (in loop pile), which contribute to a plush and luxurious appearance.

When discussing the option that states they form loops that create height, it highlights the textural quality of these fabrics, particularly in looped pile variations where the loops can indeed raise the material's surface, adding depth and a three-dimensional aspect to the fabric. This is significant because it also relates to comfort and visual appeal in interior design. The loops can create a rich tactile experience and can be manipulated in height according to design choices, making these weaves popular for rugs and upholstery.

The nature of knotted weaves also supports the idea of non-reversible characteristics, where the distinct texture on one side does not have a matching counterpart on the reverse, further enhancing the reasoning for the correct answer.