01 Using lines of similar thickness increases which harmony?
Answer and explanation
Correct answer: C. Line harmony
Explanation: The governing concept is line harmony, produced when line qualities are consistent or suitably related. Lines with similar thickness have a common visual weight, so they create continuity and make the composition feel unified. Option C is correct. Colour harmony depends on relationships among colours, shape harmony on related forms, and texture harmony on surface qualities; none of those is directly changed by line thickness.