ECS (Elastic Container Service) definition

Hello, I would like to know why answer 1 is wrong, in terms of answering the question and describing what ECS is.
Why is “a serverless compute service for running Docker containers” is wrong?

Thanks.

Hi @Mundofik

AWS Lambda is one of the Serverless services in AWS that can run containers, whereas AWS ECS is a fully managed, opinionated container orchestration service.