What should you select to enable partition discovery in the Copy activity?

To enable partition discovery in the Copy activity, selecting the option to enable partition discovery is the essential step. This functionality allows the data pipeline to automatically identify and utilize partitions in data sources that support partitioning. By enabling this feature, the data integration service can dynamically adjust to variations in data segmentation, allowing for more efficient data processing and loading.

Partition discovery optimizes how data is copied by enabling the activity to recognize and access specific subsets of data based on defined partitions, such as those defined by date or any other criterion. This greatly enhances performance by minimizing the amount of data that needs to be processed or transferred at one time, thus improving efficiency and reducing resource consumption.

Other options may involve aspects of the data management process, like staging data or configuring the mode and partition column, but they do not specifically address the mechanism needed to discover partitions in the data source itself. Activating partition discovery is the crucial action that ensures the Copy activity can effectively leverage existing data partitions.