In which condition will an object be considered a three-dimensional form?

Correct answer: When it has length, width and depth

Direct answer: C. A three-dimensional form has length, width, and depth. Because depth is present, the object occupies or represents volume and can be understood as extending through space rather than existing only as a flat outline. Option A is wrong because colour alone can appear on a flat surface and does not create a third dimension. Option B is generally two-dimensional: a printed picture has length and width on the paper, even if artists use shading to create an illusion of depth. Option D is wrong because lines can make a flat drawing, and the use of lines alone does not guarantee actual depth. The important test is the presence of all three dimensions, not the object’s colour or the drawing material. Memory cue: length plus width plus depth equals three-dimensional form.