Amazon S3 Standard-Infrequent Access (S3 Standard-IA) is designed for data that is accessed less frequently but requires rapid access when needed. It offers a lower storage price compared to S3 Standard, while retaining the high durability, throughput, and low latency of S3 Standard. S3 One Zone-IA is also for infrequently accessed data but does not provide the same level of availability as it is stored in a single Availability Zone. S3 Intelligent-Tiering automatically moves objects between different tiers, but it is not the tier itself. S3 Outposts is for extending S3 to on-premises environments and does not directly relate to cost-optimization of infrequently accessed data.