In which situation can equal-thickness lines also be a suitable artistic decision?

When the artist wants a flat, decorative, or graphic effect

The governing concept is that line treatment must serve the intended visual style. Equal-thickness lines create consistency, clarity, and a deliberately flat appearance. They are useful in decorative borders, icons, cartoons, pattern designs, and graphic compositions where uniform marks are part of the visual language. Option A is correct because a flat or graphic effect does not require strong changes in line weight. Option B is less suitable because natural deep shading usually benefits from varied density or weight. Option C specifically depends on changes in line weight to suggest spatial distance. Option D normally requires hierarchy, such as a stronger outline for the subject and lighter lines behind it. Thus, equal lines are not always a mistake; their suitability depends on artistic purpose and style.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Line.