What defines the number and type of daemons that are loaded into memory and executed by the kernel on a particular system?

The number and type of daemons loaded into memory and executed by the kernel on a system are primarily defined by the system's configuration, the services required for its operation, and the installed software packages. Daemons can be managed by init systems (like Systemd or SysVinit) that dictate which services start at boot time. Additionally, user-defined configurations and dependencies between services can influence which daemons are active. Thus, the specific use case and administrative choices play a crucial role in determining the active daemons.