Upon re-evaluating, the specific arrangement of the oranges in Cézanne's still life creates a sense of balance and visual interest. Cézanne often used asymmetrical balance in his compositions, which can lead to a dynamic feeling while still maintaining harmony.
If the oranges are positioned in a manner that leads the viewer's eye throughout the piece, it could be interpreted that they are spread out from a corner to another, contributing to the overall balance.
However, if the piece features the oranges surrounding the pitcher or arranged in a circular formation, that could also be a valid interpretation depending on your viewing perspective.
Without seeing the specific arrangement in the painting, it's challenging to definitively state the exact method of balance used. It may be beneficial to closely examine the painting or reference material to better understand its compositional strategies.
If you're looking for a safer answer regarding balance in the context of Cézanne's work and his typical style, noting how he often arranged objects in circular or dynamic patterns could be wise, as well.
Would you like guidance on another aspect of the artwork?