Which AWS managed service is specifically designed to perform extract, transform, and load (ETL) operations?

AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy to prepare and load your data for analytics. It automatically discovers and catalogs metadata, generates Python or Scala code for ETL jobs, and runs those jobs on a serverless Apache Spark environment. Amazon Athena is an interactive query service that makes it easy to analyze data directly in Amazon S3 using standard SQL, but it's not an ETL service. Amazon S3 is an object storage service, used for storing data, not for performing ETL operations. AWS Snowball Edge is a data migration device for transferring large amounts of data into and out of AWS, and for edge computing, not for ETL.