Explanation:

Microsoft states that Microsoft Sentinel includes connectors for both Microsoft and non-Microsoft sources.
The product overview explains that Sentinel "comes with built-in connectors" for services such as Microsoft
365, Defender, and Azure sources, and also built-in connectors for non-Microsoft solutions like firewalls and other security products. Therefore, the claim that data connectors support only Microsoft services is false.
For visualization and monitoring, the documentation clarifies that "Microsoft Sentinel uses Azure Monitor workbooks to provide rich visualizations of your data." Workbooks are the native dashboarding framework in Sentinel and can be customized to monitor logs, incidents, and telemetry that Sentinel ingests. Hence, using Azure Monitor Workbooks to monitor data collected by Sentinel is true.
Regarding threat hunting, Microsoft describes the Hunting capability as a proactive feature: "Hunting lets you proactively hunt for security threats," using Kusto Query Language queries and analytic patterns to find indicators of compromise before alerts are generated. Analysts can run, save, and schedule hunts to uncover suspicious activity that hasn't yet raised an alert, making the statement about identifying threats before an alert is triggered true.