What does storage vMotion allow administrators to do?

Storage vMotion is a feature that enables administrators to migrate a virtual machine (VM) from one datastore to another without requiring the VM to be powered off. This capability is particularly beneficial because it ensures that applications running on the VM continue to operate without downtime, thereby enhancing availability and productivity.

While the other options may seem relevant within the context of VM management, they do not specifically pertain to the core function of storage vMotion. Changing the VM's hardware version is a separate process that involves updating the virtual hardware and typically requires the VM to be powered off. Converting storage formats may occur during a migration but is not the primary function of storage vMotion. Resizing virtual disks also involves different operations and considerations that are not tied to the dynamic migration process that storage vMotion facilitates.

In summary, the correct answer highlights the essential function of storage vMotion, which is to enable seamless migration of running VMs between datastores.