What is a distinctive feature of graphite sticks compared to traditional pencils?

Graphite sticks stand out because they consist of solid graphite without a wood casing, unlike traditional pencils that encase a core of graphite in a wooden body. This absence of wood allows for a different usage style; artists and designers often prefer graphite sticks for their ability to produce a wide range of tonal values and textures on the page. They can be used for broad strokes or fine details, providing greater flexibility in techniques such as shading and blending.

The other options pertain to characteristics that are not unique to graphite sticks. Traditional pencils also have a lead core encased in wood, which is why they are distinct from graphite sticks. While graphite sticks may indeed be available in various sizes and colors, this variety is not a feature that sets them apart from pencils, as many pencils also come in different sizes and shades.