Which group of lines can make a decorative border?

Correct answer: Repeated wavy or geometric lines

Correct answer: A, repeated wavy or geometric lines. A decorative border is made along an edge, so it needs a clear arrangement that can continue from one section to the next. Repetition creates rhythm, and regular spacing or geometric order makes the design look intentional. A is correct because wavy or geometric lines can be repeated to form a continuous pattern. B may mark an edge or divide areas, but one plain line normally does not provide decoration or a repeating pattern. C may look accidental because it has no dependable order or rhythm. D contains no drawn line, so it cannot create a line-based border. When designing, first choose a small unit or motif, repeat it at a similar interval, and keep it aligned with the edge. The pattern may be simple; organisation is more important than complexity. Memory cue: a border needs repetition plus order, not merely a line placed near the edge.