Amazon Aurora with read replicas is suitable for applications that experience high read traffic as it offloads read requests from the primary instance to the read replicas, thereby increasing read throughput and reducing latency. Aurora automatically grows storage as needed, up to 64 TiB, which satisfies the requirement for handling sporadic but significant write loads during peak times without manual intervention. Other database services, such as using just DynamoDB or just RDS without read replicas, may not handle the read-heavy load as efficiently. Amazon Redshift is optimized for analytics and not an ideal choice for a primary application database. Using S3 as a database solution is incorrect because S3 is an object storage service and not designed to serve as a database.