Which solution will lower costs without compromising the availability of objects?
Use S3 ACLs.
Use Amazon Elastic Block Store (Amazon EBS) automated snapshots.
Use S3 Intelligent-Tiering storage.
Use S3 One Zone-Infrequent Access (S3 One Zone-IA).
Explanations:
S3 ACLs (Access Control Lists) manage permissions and access, but they do not affect storage costs or lifecycle management.
Amazon EBS snapshots are not applicable to S3 and are used for block storage, not object storage, so they won’t address S3 storage costs.
S3 Intelligent-Tiering automatically moves data between two access tiers (frequent and infrequent) based on changing access patterns, which can lower costs without compromising availability.
S3 One Zone-IA is less expensive than standard storage but is not suitable for data that needs high availability, as it only stores data in a single availability zone.
I rank that the answer is:
Use S3 Intelligent-Tiering storage.