The correct answer is Connection Monitor.

The Connection Monitor feature in Network Watcher measures end to end network connectivity and reports metrics such as round trip latency and packet loss between Azure resources and an on site corporate data center. It can run tests from virtual machines or other endpoints in the virtual network to on site endpoints so technicians can see round trip time graphs and configure alerts.

The IP Flow Verify tool checks whether a specific packet is allowed or denied by network security group rules and effective routes. It does not perform continuous connectivity tests or measure round trip latency.

The VPN Troubleshoot feature helps diagnose VPN gateway and tunnel configuration problems and shows tunnel health and negotiation details. It is useful for tunnel diagnostics but it does not provide the ongoing latency measurements that Connection Monitor provides.

Full AWS Practitioner Certification Question