[C ii]-to-continuum (top), [O i]-to-continuum (middle), and [O i]-to-[C ii] (bottom) luminosity ratios as a function of FIR luminosity (40–120 μm). Red circles denote PACS spaxels, blue square denotes the entire host, whereas plus signs, crosses and green diamonds represent normal local galaxies (Malhotra et al. 2001), dwarf galaxies (Cormier et al. 2015), and the Large Magellanic Cloud; the point at a lower luminosity is 30 Doradus and that at the higher luminosity is the entire galaxy (Poglitsch et al. 1995; Israel et al. 1996). The GRB 980425 host has elevated [C ii]/FIR and [O i]/FIR ratios for its FIR luminosity.