All of the above
Explanation:
To create unity, an artist requires art elements that in synchronisation with one another. This synchronisation can be in terms of design, style, colours used or background.
As provided in question using Organic shapes, Cool colours, and repetitive bold brush strokes would mimic one another thus exposing a sense of uniformity in the art piece.
Unity is the artist’s most pernicious weapon which can be moulded into different shapes and designs. It not only soothes the mind but clamps together contemporary art pieces with a grace.