What is a feature of vSphere?

Distributed Power Management (DPM) is a vSphere cluster feature that monitors aggregate workload and, when utilization is low, uses vMotion to consolidate VMs onto fewer hosts and powers down the now-idle ESXi hosts to conserve energy, automatically powering them back on when demand rises.

There is no vSphere feature called 'Distributed Resource Management' - the correct name for the automated load-balancing feature is Distributed Resource Scheduler (DRS).

There is no vSphere feature called 'Distributed Power Scheduler' - the correct power-reduction feature is Distributed Power Management (DPM).

There is no vSphere feature called 'Distributed Resource Protection' - this name does not correspond to any real VMware product or vSphere capability.