Which software directly supports the computer system itself?

System software is the correct answer because it encompasses the fundamental programs that manage and operate the computer hardware. This includes the operating system, which acts as an intermediary between the user and the hardware, and allows other software to run. It is responsible for managing hardware resources such as memory, processing power, and storage, essentially enabling the computer to function.

In contrast, application software is designed to perform specific tasks for users, such as word processing or graphic design, and doesn't directly interact with the hardware in the same way. Network software focuses on communication between computers over a network, facilitating connectivity and data transfer, rather than managing hardware directly. Firmware, while it does play a crucial role in running specific hardware, is often seen as a specialized subset of system software integrated into hardware components, but system software provides the broader, essential management and operational functions for the entire system.