Which type of AWS storage is ephemeral and is deleted when an Amazon (CLF-C02)

Correct answer: B. Amazon EC2 instance store.
Amazon EC2 instance store is a type of storage that is directly attached to an Amazon EC2 instance. It is ephemeral, meaning that it is deleted when the instance is stopped or terminated. This type of storage is ideal for temporary data that does not need to be persisted, such as swap space, temporary files, and caches.

Amazon EBS (Elastic Block Store) is a persistent storage service that provides block-level storage volumes that can be attached to EC2 instances. EBS volumes are not deleted when an instance is stopped or terminated.
Amazon EFS (Elastic File System) is a file-level storage service that provides a shared file system that can be accessed by multiple EC2 instances. EFS is a persistent storage service that is not deleted when an instance is stopped or terminated.
Amazon S3 (Simple Storage Service) is an object-level storage service that provides a highly durable and scalable storage solution for storing and retrieving large amounts of data. S3 is a persistent storage service that is not deleted when an instance is stopped or terminated.

So, Amazon EC2 instance store is the correct answer because it is the only type of storage that is ephemeral and deleted when an EC2 instance is stopped or terminated.