Comparison between the observed C/O ratio and [(C+O)/H] distribution (black) and the calculated distributions based on the first scenario formation retrieval, which assumes a disk with a composition similar to WASP-77A (red). The top left panel shows this distribution for planets that initiate their formation within the water ice line (no formation solution that matches this criteria was found). Top right panel shows this distribution for planets that initiate their formation between water and CO₂ ice line. Bottom left panel shows this distribution for planets that initiate their formation between CO₂ and CO ice line. Bottom right panel shows this distribution for planets that initiate their formation beyond the CO ice line.