To which one of the following processes is the term CMYK related?

CMYK is the standard subtractive color model used for physical printing; the acronym stands for Cyan, Magenta, Yellow and Key (Black) and describes the four inks used to reproduce full-color images [1]. In print workflows colors are separated into these four channels and printed as tiny overlapping dots (the “four-color” or process printing method) so printers can recreate a wide gamut on paper. Offset printing in particular requires converting artwork to the CMYK color model and creating plates for each of the four inks — a routine step in offset press prepress and production — making CMYK fundamentally associated with offset printing processes [2].

Sources

1. [1] https://cbseacademic.nic.in/web_material/Curriculum21/publication/secondary/415%20MEDIA%20IX%20Texturing%20Artist.pdf
2. [2] https://cec.nic.in/webpath/curriculum/Module/FART/Paper21/2/downloads/script.pdf