In this exercise we have to use computer knowledge to define the missing word in the sentence, so we have:
The operating system is loaded into memory during the installation process
In computing, an installation (or setup) is a process (or its result) when all necessary files are placed on a computer so that the program (e.g., operating system, device driver, application software, extension module, etc.) , patch, etc.)
So the missing word to define this term is "installation", that is, the definition of the installation process.
See more about definition at brainly.com/question/5784950
