How can repetition in linear decoration be prevented from becoming boring?

Correct answer: By adding small rhythm changes and proportional variation

Repetition gives linear decoration unity, but exact repetition everywhere can make a design feel mechanical and dull. Small, controlled changes can keep the viewer interested while preserving the main pattern. These changes may involve the direction, length, spacing, thickness, curve, or size of lines. Proportional variation means that the differences are balanced and related, rather than random or chaotic. Good decoration combines order with enough variety to create visual life.

Option D is correct because small rhythm changes and proportional differences prevent the repeated lines from becoming monotonous. The basic arrangement remains recognisable, but the eye notices gentle movement and variation. Keeping every line exactly identical may produce strict order but can appear lifeless; erasing the lines destroys the decoration, and ignoring direction removes an important source of rhythm. Therefore, controlled variation is the best artistic solution, not complete uniformity or disorder.