Step 1: Understanding the Concept:
Landscape and garden design is a specialized branch of ornamental horticulture that utilizes artistic and scientific principles to arrange plant materials, hardscape elements, and landforms.
The main objective of design is to create a harmonious, aesthetically pleasing, and highly functional outdoor environment.
To achieve this, designers adhere to a set of core design guidelines known as the principles of landscape design.
These principles are distinct from the elements of design (such as line, form, texture, and color) and represent the rules of arranging those elements.
Step 2: Detailed Explanation:
Let us analyze each of the given components:
(A). Accent:
Accent (also referred to as emphasis or dominance) is a key principle of landscape design.
It involves creating a focal point in the garden that immediately draws the viewer's attention.
An accent can be achieved by placing a striking plant specimen, a statue, a fountain, or a unique color group in a strategic location.
Without an accent, a garden design can feel monotonous and lack a visual anchor.
Thus, (A) is a core design principle.
(B). Balance:
Balance refers to the visual equilibrium of the landscape composition.
It can be symmetrical (formal balance, where one side is a mirror image of the other) or asymmetrical (informal balance, where different elements on opposite sides create equal visual weight).
Achieving balance ensures that the design feels stable and visually comfortable.
Thus, (B) is a core design principle.
(C). Habit:
Growth habit refers to the natural shape, form, and growth rate of a plant species (such as weeping, upright, rounded, or prostrate).
While habit is an important biological characteristic of plant materials that designers must consider, it is a plant attribute rather than a fundamental principle of design itself.
Thus, (C) is not a principle of design.
(D). Proportion:
Proportion (or scale) refers to the size relationship between different elements of the design and the surrounding space.
For instance, the size of a tree must be in proportion to the house, and the width of a path must match the scale of the garden bed.
Correct proportion prevents elements from overwhelming the space or appearing insignificantly small.
Thus, (D) is a core design principle.
Combining (A), (B), and (D) identifies the valid principles of garden and landscape design.
Step 3: Final Answer:
Therefore, the correct option containing only the valid design principles is (C).