How is an effect made by changing thickness in one line?

Correct answer: By varying line weight

Direct answer: the effect is made by varying line weight, meaning the line is made thinner or thicker at different places. A line is not only a boundary; its thickness can communicate visual meaning. A thick line usually appears stronger, heavier, closer, or more forceful, while a thin line may appear delicate, light, or farther away. By changing thickness gradually or suddenly, an artist can create emphasis, depth, movement, contrast, and rhythm. Option A is correct because it directly changes the visual quality of the line. Option B is incorrect because paper type may affect the surface or texture, but it does not itself vary the drawn line. Option C is incorrect because removing a frame changes presentation, not line thickness. Option D is incorrect because drying colour changes its condition, not the width of the line. Memory cue: line weight means the visual heaviness of a line; thick and thin are changes in line weight.