Final answer:
Charcoal is a carbon stick made from burnt wood that is commonly used for drawing. It comes in different forms and allows artists to achieve a range of values in their drawings. Graphite is another form of carbon used in drawing.
Step-by-step explanation:
Charcoal is a carbon stick created from burnt wood and is commonly used to make drawings. It is available in different forms such as vine charcoal and compressed charcoal. Vine charcoal comes in soft, medium, and hard densities, each handling differently. The artist can achieve a range of values from light grays to rich blacks with charcoal drawings.
Graphite is another form of carbon used in drawing, which is mixed with clay and encased in a wooden tube. It offers different hardness levels for varying line quality.