What design technique uses varying heights of stems to create a three-dimensional effect?

The design technique that uses varying heights of stems to create a three-dimensional effect is known as the Stair Step Manner. This approach involves arranging flowers and foliage at different levels, which creates visual interest and depth within the arrangement. By employing this technique, a designer can draw the viewer's eye from the foreground to the background, enhancing the overall impact of the floral design.

This method is particularly effective in showcasing the beauty and characteristics of each individual stem while simultaneously contributing to a cohesive aesthetic. The varying heights allow for a more dynamic representation, making the arrangement feel fuller and more engaging.

In contrast, other options do not specifically refer to the use of height to achieve a three-dimensional appearance. Waterfall Design typically emphasizes flow and movement rather than height variation. Customer Education relates to informing clients about floral care and design principles, which does not pertain to a specific design technique. Processing Flowers involves the preparation and care of flowers before they are used in designs, focusing on their longevity and freshness rather than the arrangement aesthetics. Thus, Stair Step Manner distinctly embodies the creative use of varied heights for depth in floral design.