Data on Amazon EBS volumes could be backed up by performing point-in-time snapshots. Snapshots are incremental backups. Only the changed blocks after the most recent snapshot are saved.
Where are these EBS snapshots stored?

Answer options:

A.Amazon EBS Volume
B.Amazon S3
C.Amazon EFS
D.Amazon Aurora

Answer: B
Option A is INCORRECT. Snapshots are point-in-time backups of EBS volumes and are stored in Amazon S3.
Option B is CORRECT. Refer to the link below for details.
Option C is INCORRECT. Snapshots are stored in Amazon S3.
Option D is INCORRECT. Snapshots are not stored in Aurora. The snapshots are stored in Amazon S3.
 Reference:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html