What entities can be monitored when configuring a host in Zabbix?

The selection of items, triggers, graphs, web scenarios, and discovery rules as entities that can be monitored when configuring a host in Zabbix is accurate because these components are fundamental to the monitoring capabilities within the Zabbix ecosystem.

Items are the basic units of monitoring—they represent the metrics collected from hosts, such as CPU load, memory usage, disk space, etc. Triggers are used to define conditions that alert users when specific thresholds are crossed, allowing proactive management of the monitored environment. Graphs visualize these items over time, providing insights into trends and behavior. Web scenarios allow monitoring of the performance of web applications by defining sequences of requests to a web page, helping in measuring response times and server behavior. Lastly, discovery rules automate the identification and addition of new items and triggers for hosts, making it easier to manage dynamic environments where resources might change frequently.

The other options provided include entities that are either related to IT service management or do not exist within the specific monitoring framework of Zabbix, thus solidifying that the first choice is the most relevant and aligned with Zabbix functionality.