Which of the following is the BEST example of IaaS?

In IaaS, the underlying hardware is owned by the third-party provider, not the user.

While the third party owns, hosts, and manages hardware, explicitly including 'software' as also owned, hosted, and managed by the third party makes it sound more like PaaS or SaaS, where a greater stack including the OS and runtime is managed by the provider, rather than just the core infrastructure.

In Infrastructure as a Service (IaaS), the cloud provider owns, hosts, and is responsible for managing the underlying physical hardware infrastructure, including servers, storage, and networking components. Users then rent these virtualized resources and are responsible for managing the operating systems, applications, and data deployed on them.

In IaaS, the third-party provider owns and manages the hardware, while the user owns and manages the operating system, applications, and data, not the physical hardware itself.