Which of the following is a software layer that interacts between the virtualized operating system and the physical hardware?

A System Resource Manager is typically a component within an operating system or management software for allocating and monitoring system resources, not an intermediary between a virtualized OS and hardware.

The Server BIOS (Basic Input/Output System) is firmware that initializes hardware components during boot-up but does not act as a software layer mediating between a virtualized OS and physical hardware.

A Guest Operating System is the virtualized operating system running inside a virtual machine, not the layer that mediates between itself and the physical hardware.

A hypervisor, also known as a Virtual Machine Monitor (VMM), is a software layer that runs directly on the host hardware or within an operating system, enabling the creation and management of virtual machines. It virtualizes the physical hardware resources and presents them to each guest operating system, allowing multiple isolated operating systems to run concurrently on a single physical machine.