Which feature in Amazon S3 uses a write-once-read-many (WORM) model for object storage?

The feature in Amazon S3 that utilizes a write-once-read-many (WORM) model for object storage is S3 Object Lock. This functionality is designed to help organizations meet regulatory compliance and data retention requirements by preventing objects from being deleted or overwritten for a specified period.

When Object Lock is enabled, users can enforce retention settings on their S3 objects, meaning that once an object is created and locked, it cannot be altered or removed until the retention period expires. This characteristic aligns perfectly with the WORM model, as it ensures that data integrity is maintained and users can only append data instead of modifying or deleting it.

In contrast, S3 Versioning allows for maintaining multiple versions of an object, but it does not restrict the ability to overwrite or delete older versions unless combined with Object Lock. S3 Lifecycle Policy governs the automated transitions of objects between storage classes but does not impose WORM-like restrictions on data. Finally, S3 Intelligent-Tiering optimizes storage costs over time by automatically moving objects between two tiers, but again, it does not provide WORM functionality.

Thus, the correct answer reflects the specific capabilities of S3 Object Lock in terms of protecting data through a WORM storage model.