Chemical abundances, arranged in ascending order of atomic number (x-axis), of the six main stellar groups (y-axis; in terms of solar abundance) classified using an HC algorithm. On the right side of the figure, each group is labelled with its corresponding number, along with the total count of stars in each group. 〈[X/H]〉 = 0 is depicted by the black horizontal to represent the solar abundances. It is important to note that the lines in the image are not indicative of regression but are rather utilised to visually represent the relative increase or decrease in element abundance compared to the preceding element. The shaded areas depict the 1σ (16–84%) confidence interval after bootstrapping the data of each group.