Which of the following features allows modifying data after retrieving it from a source?

Data Transformation refers to the processes that modify or convert data after it is retrieved from a source. This feature enables users to alter, combine, enrich, or cleanse data to ensure it meets specific requirements before it is loaded into a destination. Transformation operations may include tasks such as filtering records, changing data formats, aggregating information, or applying business rules, all aimed at making the data more useful and aligned with the needs of the target system.

In contrast, the other options do not involve modifying the data itself after retrieval. Data Import pertains to bringing data into a system from external sources without altering it, while Data Export involves sending data out of a system, typically in its original form. Data Deletion refers to the removal of data from a system altogether but does not involve any modification of its contents after retrieval. Thus, the ability to modify data is distinctly found within the scope of Data Transformation.