Correct answer - "Redshift" : Amazon Redshift is a fully managed, petabyte-scale data warehouse
service in the cloud. You can start with just a few hundred gigabytes of data and scale to a
petabyte or more. This enables you to use your data to acquire new insights for your business
and customers
"RDS" - RDS is good for transactional databases
"DynamoDB" - DynamoDB is good for NoSQL databases that are non relational
"ElastiCache" - Allows you to retrieve information from fast, managed, in-memory caches