Correct answer - "ECS" : Amazon ECS lets you easily build all types of containerized
applications, from long-running applications and microservices to batch jobs and machine
learning applications. You can migrate legacy Linux or Windows applications from on-premises to
the cloud and run them as containerized applications using Amazon ECS.
"ECR" - Amazon ECR is a managed AWS Docker registry service and is an extension to Amazon ECS
"Lambda" - Lambda functions cannot run in Docker containers
"EC2" - Amazon ECS uses Docker images in task definitions to launch containers on Amazon EC2
instances in your clusters