What describes the operation of virtual machines?

Hypervisors, not virtual machines themselves, are responsible for managing and allocating host hardware resources to multiple VMs.

In a virtual machine environment, one of the primary benefits is that multiple operating systems can run concurrently on a single physical server, each within its own VM.

Virtual machines are software entities, not the physical hardware that supports a virtual environment; physical servers and hypervisors provide the underlying hardware and management.

Virtual machines (VMs) are essentially operating system environments that run as software instances, decoupled from the direct physical server hardware. A hypervisor manages the allocation of underlying hardware resources to these VMs, allowing multiple OS instances to coexist on a single physical machine.