Answer: Amazon Glacier

Amazon Glacier is specifically designed for data archiving and long-term backup where data is infrequently accessed. It offers extremely low-cost storage compared to other AWS storage services: - **Amazon Storage Gateway**: Hybrid storage service that connects on-premises environments to AWS cloud storage - **Amazon EBS**: Block storage service for EC2 instances, designed for frequently accessed data - **Amazon S3**: Object storage for frequently accessed data (though S3 has different storage classes) Amazon Glacier provides the most cost-effective solution for infrequently accessed data due to its archival pricing model and retrieval characteristics optimized for long-term storage.

Author: Ritesh Yadav