Final answer:
The question pertains to Salesforce functionality, where a trigger checks if a record is recovered from the Recycle Bin using the Trigger.isUndelete context variable, which returns true after an undelete operation.
Step-by-step explanation:
The question refers to a specific functionality within Salesforce, a popular customer relationship management (CRM) platform. It asks about a trigger that returns true if it was fired as a result of a record being restored from the Recycle Bin, indicating that the record was undeleted. In the Salesforce context, triggers are a type of Apex code that execute before or after data manipulation language (DML) events. The detection of a record recovery is typically handled by checking the trigger context variable Trigger.isUndelete, which specifies if the trigger was fired after an undelete operation. If this variable is true, it implies that the record has been recovered from the Recycle Bin.