what should you implement?

DRAG DROP
You plan to deploy an application by using three Azure virtual machines (VMs). The application has a webbased component that uses TCP port 443 and a custom component that uses UDP port 2020.
The application must be available during planned and unplanned Azure maintenance events. Incoming client
requests must be distributed across the three VMs. Clients must be connected to a VM only if both application
components are running.
You need to configure the VM environment.
For each requirement, what should you implement? To answer, drag the appropriate configuration type to the
correct target. Each configuration type may be used once, more than once, or not at all. You may need to drag
the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:

Answer:

Explanation:
Box 1:availability set.
Box 2:
backend pool.
Box 3:
health probe.

https://docs.microsoft.com/en-us/azure/guidance/guidance-compute-multi-vm