Which AWS service should the company use for the data warehouse?

Explanations:

Amazon ElastiCache is a caching service designed to improve the performance of applications by storing frequently accessed data in memory. It is not intended for use as a data warehouse.

Amazon Aurora is a relational database service that is compatible with MySQL and PostgreSQL. While it can handle large datasets, it is primarily designed for transactional workloads rather than analytical processing typical of a data warehouse.

Amazon RDS (Relational Database Service) is a managed service for relational databases. It is suitable for transactional workloads but not optimized for complex queries and large-scale analytics, which are characteristic of a data warehouse.

Amazon Redshift is a fully managed data warehouse service designed for online analytical processing (OLAP). It allows for high-performance querying and analysis of large datasets, making it the ideal choice for migrating an on-premises data warehouse.