Final answer:
In her self-portrait, Gedo used pencil to vary the line quality to suggest texture, create emphasis, and produce darker values. This variation in line helps to convey a more three-dimensional feel and to highlight certain elements of the drawing.
Step-by-step explanation:
In her self-portrait, the artist Gedo used pencil and varied the line quality in order to suggest texture, create emphasis, and to produce darker value. The line is a fundamental element in art used to define shapes and suggest form. In drawing, the line quality can include various characteristics such as weight, thickness, and texture. Varying these attributes allows the artist to convey a sense of three-dimensionality and to emphasize certain aspects of their work.
Different pencil leads with varying levels of hardness can be used to achieve different tones and shades. Techniques such as hatching and crosshatching help in creating shading and depth within a drawing. Also, an approach where texture and line interact can greatly enhance the perception of surface qualities, much like the use of light and shadow helps to build volume and spatial relationships in a composition.