The arrangement of visual elements to create a sense of oneness is called:

Unity is the principle of design that describes the arrangement of visual elements to create a sense of oneness or wholeness in an artwork. When unity is achieved, all parts of the composition feel as though they belong together, and no single element appears out of place or disconnected from the rest.

Artists achieve unity through consistent use of colour, repeated shapes, harmonious proportions, and careful placement of elements so they relate to one another. Techniques such as proximity (placing related elements close together), repetition, and a limited colour palette all contribute to a unified composition.

Variety refers to the use of different elements to add visual interest and prevent monotony - it is the complement of unity rather than a synonym for it. Emphasis is the principle of making one element stand out as a focal point to draw the viewer's attention. Dominance is closely related to emphasis and refers to one element overpowering others in the composition. None of these three describe the creation of a sense of oneness.