What can happen if a boundary line is very thick in a picture?

Correct answer: It can place greater emphasis on the edges of the picture

Direct answer: a very thick boundary line can place greater emphasis on the edges of the picture. Line thickness gives visual weight, so a thick outline attracts attention and makes the boundary appear strong, dark, and prominent. Option A is correct because it describes the direct visual effect of a heavy outer line. Option B is incorrect because line thickness does not make colours completely fade; colour appearance depends on the colours and rendering used. Option C is incorrect because an outline can make an object seem visually stronger or more separated, but it cannot automatically change the object’s actual size. Option D is incorrect because drawing a thick line does not alter the physical dimensions of the paper. A very heavy boundary can sometimes make an image look enclosed or less delicate, so the artist should choose thickness according to the intended effect. Memory cue: thick outline equals strong visual weight and emphasis, not a change in paper or object size.