How does line bring beauty in decoration?

Correct answer: By making a regular pattern

Answer: A, by making a regular pattern. Decorative art uses lines to organise repeated shapes, borders, motifs, and designs. When lines are repeated with suitable spacing and arranged in an orderly pattern, they create rhythm, balance, and visual unity. This organised repetition can make a border, textile design, ornament, or surface look attractive. Option A is correct because a regular line pattern gives decoration structure and beauty. Option B is incorrect because hiding the paper does not create a visible decorative design. Option C is incorrect because breaking a frame is not the normal method of making a line-based pattern and may only damage the presentation. Option D is incorrect because closing or blocking colour does not explain how lines themselves decorate a surface. Decoration may sometimes use irregular lines too, but the key idea in this question is the orderly pattern made by lines. First identify a motif, repeat it, and keep spacing reasonably controlled. Memory cue: decorative line means repeated design, not random marks.