From which table is the Incident table extended?

The Incident table in ServiceNow is extended from the Task table, which is known by its internal name as 'task'. This means that the Incident table inherits all the fields and properties of the Task table, allowing for consistent behavior and functionality across different modules that utilize task management, such as incidents, changes, and problems.

By extending from the Task table, the Incident table benefits from features like task lifecycle management, state transitions, notifications, and other properties that fulfill the requirements of an IT service management process. This design promotes best practices in data management, ensuring that incidents can leverage shared attributes and methods defined in the Task table, thus enhancing system consistency and efficiency.

The other options do not accurately represent the table from which the Incident table is derived. For instance, while 'sn_task' is a variant of the Task table with some specific configurations, it is not the primary table from which the Incident table is extended. Similarly, 'ticket' and 'sn_work' do not reflect the correct hierarchy in the ServiceNow data model for incidents.