What allows users to directly interact with their computers?

Software is the correct answer as it encompasses the programs and applications that enable users to directly perform tasks and interact with their computers. This includes operating systems, applications, and utilities that provide a graphical interface or command-line interface for users to work with.

When users run a program, the software translates their commands into actions that the hardware can execute, facilitating tasks such as creating documents, browsing the internet, or managing files. Without software, the hardware components would not be able to perform useful functions, effectively rendering the computer unusable for direct interaction.

In contrast, hardware refers to the physical components of the computer, such as the CPU, RAM, and hard drive, which do not directly enable user interaction without accompanying software. A network connects multiple devices but does not inherently allow for user interaction with a single computer. Firmware is specialized software that provides low-level control for a device's specific hardware but does not typically facilitate direct user interaction in the way that application software does.