Which additional vCenter Server feature must be configured for DRS to balance workloads?

vSphere HA provides host and VM failure protection by restarting VMs after failures, but it is a separate feature from DRS and is not required for DRS to perform automated load balancing.

Resource Pools provide a hierarchical structure for allocating CPU and memory shares among groups of VMs, but configuring them is not a prerequisite for DRS to detect imbalances and execute migrations.

vSphere DRS relies on vMotion to non-disruptively move running virtual machines from one host to another as it balances CPU and memory resources across the cluster. Without vMotion configured on the hosts, DRS can calculate and display migration recommendations but has no mechanism to actually execute them, making automated workload balancing non-functional.

Proactive HA uses hardware health sensor data to preemptively evacuate VMs from degrading hosts, but it is an extension of standard HA functionality - not a requirement for core DRS workload balancing.