What problem may occur if line weight is too uniform in a picture?

Correct answer: Reduced difference between main and secondary parts

The correct answer is A: the difference between the main and secondary parts may become weak. Line weight means the apparent thickness, darkness, or strength of a line. Artists can vary it by pressing harder, using a broader tool, or making some lines darker and others lighter. If every line has exactly the same strength, the viewer may not know which object or area is most important. The picture can look flat, monotonous, and less expressive because emphasis is lost. A is correct because controlled variation helps separate the focal area from supporting details. B is wrong because line weight cannot create a smell. C is wrong because lines do not fill colour automatically. D is wrong because line weight does not change the physical size of the paper. Memory cue: stronger line usually attracts attention; lighter line usually supports or recedes.