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In this work, we investigate the reason behind the increased occurrence of S0galaxies in high density environments. Our sample comprises of $\sim$ 2500spiral and $\sim$ 2000 S0 galaxies spanning a wide range of environments.Dividing the galaxies into categories of classical and pseudobulge hostingspiral and S0 galaxies, we have studied their properties as a function of theenvironment. We find that the fraction of pseudobulge hosting disc galaxiesdecreases with increase in density. The classical bulge hosting spirals and S0galaxies follow a similar trend in less dense environments but towards higherdensities, we observe an increase in the fraction of classical bulge host S0galaxies at the expense of spirals. Comparing the structural and the starformation properties of galaxies on the size-mass and $NUV-r$ colour-massplanes respectively, we infer that classical bulge hosting spirals are likelyto get transformed into S0 morphology. We notice a trend of galaxy structurewith environment such that the fraction of classical bulge hosting spiralgalaxies is found to increase with environment density. We also find that amongclassical bulge hosting spirals, the fraction of quenched galaxies increases indenser environments. We surmise that the existence of more classical bulgehosting spirals galaxies and more efficient quenching leads to the observedincreased occurrence of S0 galaxies in high density environments. The relationbetween galaxy structure and environment also exists for the disc galaxiesirrespective of their visual morphology, which is driven mainly by halo mass.

Connecting galaxy structure and star formation: the role of environment in formation of S0 galaxies