Which VMware vSphere feature, when configured, streams a guest VM's changes to an exact replica VM on another host to prevent outages and data loss?

Which VMware vSphere feature, when configured, streams a guest VM's changes to an exact replica VM on another host to prevent outages and data loss?

• DRS
• High Availability
• Fault Tolerance
• Distributed Virtual Switching

EXPLANATION

VMware's Fault Tolerance (FT) feature allows you to protect a VM with an exact copy on another host machine. All of the changes are synced to the copy, so if the host fails in any way, vSphere will activate this copy. The effect is instantaneous, and allows you to provide constant uptime for mission-critical VMs.
You can read about Fault Tolerance, as well as its requirements and restrictions here: https://www.vmware.com/products/vsphere/features/fault-tolerance