What do "emphasizers" refer to in landscaping?

In the context of landscaping, "emphasizers" specifically refer to plants that are strategically used to accentuate or highlight particular design features within an environment. These plants can draw attention to focal points, create dramatic effects, or enhance the overall aesthetic appeal of a landscape design. By selecting certain species that contrast or complement other elements in the garden—such as pathways, water features, or seating areas—landscape designers can effectively guide the viewer's eye and enhance the spatial experience.

The other options do not accurately reflect the definition of "emphasizers." For example, while a type of ornamental tree could be used to emphasize a feature, not all ornamental trees serve this purpose, and this choice does not encompass the broader category of plants that might act as amplifiers of design. Similarly, structures that create height in gardens do not fit the definition as they refer to hardscape elements rather than plant material. Lastly, species classified as invasive are detrimental and do not serve an aesthetic purpose; they actually disrupt the intended design and health of the landscape.

Therefore, the understanding of "emphasizers" is crucial in designing effective and attractive landscapes that utilize plant materials to their fullest potential.