What does 'kernel mode' provide in a computer system?

Kernel mode is a critical operating mode for a computer's processor that provides the highest level of access to system resources. In this mode, the operating system has unrestricted access to hardware and can execute privileged instructions that control hardware components and manage system resources such as memory, processors, and input/output operations. This capability is essential for the operating system to perform core functions, maintain system stability, and ensure the overall security of the system by managing various processes.

In contrast, other access levels, such as user mode, restrict applications from directly interacting with hardware or executing certain privileged instructions to ensure system integrity and protect against erroneous or malicious behavior. Therefore, the ability to execute privileged instructions is a key characteristic of kernel mode, distinguishing it from other operating modes that have more limited access. This is why the correct answer emphasizes that kernel mode allows for the execution of privileged instructions.