Swap space is a dedicated area on a secondary storage drive, such as a hard disk or solid-state drive, that the operating system uses as a temporary extension of physical RAM.
When the physical memory of a computer becomes fully saturated with active tasks, the memory management subsystem moves inactive memory pages out of RAM and writes them into this disk storage area.
This process of moving memory blocks between RAM and disk is called swapping or paging, and it frees up high-speed physical memory slots so the CPU can continue running active processes without crashing.
The information stored within this designated disk area consists directly of process memory contents, including stack allocations, heap variables, and execution states belonging to running or suspended programs.
Saving temporary HTML pages is a function handled by web browsers via disk caching, storing the super-block is a core file system management task, and storing device drivers keeps executable code on the main boot partition.
Because swap space specifically functions to back up and extend the active runtime memory allocations of executing programs, its primary role is holding active process memory states.
Correct Option: B
