In his painting the flagellation, italian artist piero della francesca created unity by concentrating groups of figures in two different areas, and

Background and Foreground

Explanation:

The Flagellation is one of the famous painting by Italian artist Piero della Francesca. This painting shows two different areas in the painting, in the background Jesus is standing in the open gallery, being whipped by the Roman, and in the foreground, three men in the attire of Renaissance, having a conversation and unaware of the what happening behind them.

answer; i believe the correct answer is (proximity);