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