If an artist creates a figure without outline using only inner lines what is the artist depending on?

Inner structure and implied boundary

The governing concept is implied contour supported by interior line structure. When an artist omits the outside outline, inner marks can still show joints, planes, direction, proportion, or the way parts are arranged. From these clues, the viewer mentally reconstructs the figure’s outer edge. This inferred edge is an implied boundary, so option A is correct. Option B cannot be the basis because the question specifically says that no outer contour is used. Option C could help in some drawings, but the question identifies inner lines as the principal device, not colour contrast. Option D refers to surface texture, which may add material information but does not by itself establish the whole figure. The success of this method depends on selective, informative interior marks rather than enclosing every edge.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Line.