Which vSphere feature is designed to distribute space usage and I/O load across multiple datastores?

A vSphere administrator is working in a high security environment. The administrator wants to ensure unencrypted VMs can be migrated securely.
What should the vSphere administrator use to meet this requirement?

An administrator runs a vSphere cluster containing database VMs with extremely heavy disk I/O. Database VMs are placed on a costly all-flash array.
The workloads are not memory intensive.
How can the administrator ensure the most cost-effective utilization of the all-flash storage array?

A vSphere administrator has renamed the inventory name of a virtual machine.
Which task should the administrator perform to ensure the virtual machine files are also renamed to match the new virtual machine name?

An encrypted VM needs to be migrated from New York to London. This particular VM houses sensitive information that needs to be encrypted during transit.
What must be done to ensure Long Distance vMotion traffic is encrypted in flight?