Which AWS service is a fully managed container orchestration service for deploying and managing containerized applications?

Amazon ECS (Elastic Container Service) is a fully managed container orchestration service that enables users to deploy and manage containerized applications easily. It supports the use of Docker containers and provides functionalities such as automatic scaling, service discovery, and load balancing. Users can launch their applications as tasks within clusters, allowing for flexibility in how they manage their containerized workloads.

ECS allows integration with other AWS services and offers various deployment options, making it suitable for different application architectures. Its ease of use and deep integration with the AWS ecosystem make it an ideal choice for running containerized applications without the overhead of managing the underlying infrastructure.

Additionally, while Amazon EKS (Elastic Kubernetes Service) is also a managed service, it is specifically for Kubernetes orchestration, which is a slightly different approach to managing containers. AWS Lambda is designed for serverless computing and does not directly manage containers in the same way. Amazon Fargate is a technology used with ECS and EKS for running containers without managing servers, but it is not an orchestration service by itself. Thus, ECS is the right choice for the question regarding a fully managed container orchestration service.