Concept:
Composition is the arrangement and organization of the formal elements of art—such as line, shape, colour, texture, form, space, and value—within an artwork. It determines how these elements are placed to create unity, balance, emphasis, rhythm, and harmony.
Composition is different from the subject matter, content, or theme of an artwork because it deals with how the visual elements are organized rather than what the artwork represents.
Step 1: Identify the concept described in the question.
The question refers to the arrangement of formal elements in an artwork, independent of its subject or theme.
This is known as
\[
\boxed{\text{Composition}}
\]
Step 2: Examine the given options.
• Balance -- A principle of design referring to visual equilibrium.
• Plane -- A two-dimensional surface or flat area in art.
• Composition -- Correct; the arrangement of formal elements in an artwork.
• Hatching -- A drawing technique using parallel lines to create tone and texture.
Hence,
\[
\boxed{\text{(C) Composition}}
\]