[Sr/Zr] ratio vs. stellar mass. Theoretical AGB yields: FRUITY (Cristallo et al. 2015), and Monash (Karakas et al. 2018). The massive star yields are taken from Limongi & Chieffi (2018). The horizontal solid gray line shows the [Sr/Zr] abundance ratio of 47 Tuc, where the abundances of Sr were determined in this work and the abundances of Zr were taken from Kolomiecas et al. (2022). The shaded gray area shows the standard deviation due to the star-to-star Sr and Zr abundance scatter.