The correct service allows developers to describe their infrastructure in a domain-specific language within text files, which are parsed to deploy and manage resources in the cloud automatically. It supports templates in both JSON and YAML formats. By using this service, infrastructure is treated as code, which can be version controlled and reused. This fits within the principle of Infrastructure as Code (IaC). While AWS SAM is an extension specifically for serverless applications, and that builds upon the capabilities of this service, targeting application-specific resources more natively.