What occurs when Sync is selected during the configuration of an external data source?

When Sync is selected during the configuration of an external data source, a Salesforce external object is created. This functionality enables Salesforce to connect with external systems and access data that resides outside of the Salesforce platform. External objects are similar to custom objects but are used specifically to store data related to external data sources.

By creating an external object, Salesforce ensures that users can work with this external data seamlessly, allowing for real-time access and manipulation without needing to import or duplicate data within Salesforce. This feature is particularly useful for organizations looking to integrate external databases or other systems, facilitating a more comprehensive view of information and enhanced reporting capabilities directly within Salesforce.

The other options do not accurately describe the result of selecting Sync. There is no automatic generation of reports or backups, nor is there a log of changes specifically created within this context.