Which drawing technique utilizes overlapping parallel lines to suggest depth and shadow?

The technique that utilizes overlapping parallel lines to suggest depth and shadow is cross hatching. Cross hatching involves drawing multiple sets of parallel lines that intersect at various angles, allowing the artist to create a gradient of tone and texture. By varying the density and direction of these lines, the artist can depict light and shadow, giving a three-dimensional quality to the drawn subject. This technique is particularly effective for rendering shading and creating a sense of volume in drawings.

Additionally, stippling, while also a method for creating value through dots rather than lines, does not involve overlapping parallel lines. Contour drawing focuses on capturing the outline and essential shape of a subject without considering light or shadow, and gesture drawing captures the movement and basic structure of a subject quickly, rather than focusing on details like depth or shading. Thus, cross hatching stands out as the most appropriate choice for suggesting depth and shadow through the use of overlapping parallel lines.