Correct answer - "Fargate" : AWS Fargate is a compute engine for Amazon ECS that allows you to
run containers without having to manage servers or clusters. With AWS Fargate, you no longer
have to provision, configure, and scale clusters of virtual machines to run containers. AWS
Fargate eliminates the need to manage a cluster of Amazon EC2 instances
"ECS" - This requires deploying EC2 instances in advance and according to the question we do not
want to do that
"EKS" - EKS is AWS managed Kubernetes and requires deploying EC2 instances. Additionally it's not
serverless.
"Beanstalk" - Beanstalk is a managed solution but behind the scenes it also uses EC2 instances,
so it is not serverless.