As Fig. 2, but for the presupernova (dashed lines) and postsupernova (solid lines) stages, with the inclusion of ⁵⁶Ni. The supernova explosion was modeled with a semianalytical approach, using the Sedov blast wave (SBW) solution for the determination of the peak velocity of the shock throughout the stellar structure and the remnant mass prescription from Fryer et al. (2012) (see Pignatari et al. 2016; Ritter et al. 2018a; Roberti et al. 2024c, for a detailed description of the explosion method). The gray bands in the plots mark each explosive burning stage in the corresponding mass coordinate (i.e., complete and incomplete Si burning, explosive O, Ne, and C burning). The vertical dotted line represents the mass-cut that divides the supernova ejecta from the remnant mass. The variation of ²⁴Mg and ³²S in the He shell represents the activation of the α capture chain in the explosive He burning (Pignatari et al. 2023).