Which is not a principle of design? Contrast Space Unity Line

## Step 1<br />The principles of design are guidelines that artists use to organize the elements of art in a way that is visually pleasing and effective. These principles include balance, contrast, emphasis, movement, pattern, rhythm, space, unity, and variety.<br /><br />## Step 2<br />The options provided in the question are Contrast, Space, Unity, and Line. Among these, Contrast, Space, and Unity are recognized principles of design.<br /><br />## Step 3<br />However, Line is not a principle of design. Instead, it is an element of art. Elements of art are the basic components used to create any artwork, such as line, shape, form, value, space, color, and texture.