Answer: Amazon EBS Volumes

## Explanation Amazon EBS (Elastic Block Store) volumes are durable, block-level storage devices that can be attached to EC2 instances to store data. Here's why each option is correct or incorrect: - **A. Amazon Glacier** ❌ - This is an archival storage service for long-term data retention, not designed for direct attachment to EC2 instances - **B. Amazon EBS Volumes** ✅ - Correct answer. EBS volumes are specifically designed to be attached to EC2 instances as block storage devices for data that requires frequent updates - **C. Amazon EBS Snapshots** ❌ - These are point-in-time backups of EBS volumes, not storage devices that can be directly attached to instances - **D. Amazon SQS** ❌ - This is a message queuing service, not a storage service that can be attached to EC2 instances **Key Points:** - EBS volumes provide persistent block storage for EC2 instances - They can be used as system drives or for database applications - Data persists independently of the instance lifecycle - Multiple EBS volumes can be attached to a single EC2 instance - Volumes are automatically replicated within their Availability Zone for durability

Author: Ritesh Yadav