KS relations for clumps (left) and regions (right) in our sample. Clumps show a superlinear trend, whereas regions yield a nearly linear relation. Data from the U/LIRG study of Wilson et al. (2019) are shown in green. The different colours correspond to the merger stages of the galaxies: isolated (blue), pairs (red), early-stage mergers (orange), mid-stage mergers (magenta), and late-stage mergers (black). The Spearman’s rank correlation coefficients (ρ_s) and the power-law indices (N) of the best-fit relations, derived from our sample, are indicated.