Which AWS service models and provisions resources based on a template in an automated and secure way?

AWS CloudFormation is designed specifically to model and provision AWS resources in a consistent and automated manner using templates. It allows users to define the infrastructure they need as code, enabling them to deploy and manage resources with ease and security. Through the use of JSON or YAML templates, CloudFormation organizes and configures resources like EC2 instances, RDS databases, VPCs, and more, ensuring that the deployment process is repeatable and reliable.

This infrastructure-as-code approach removes the manual steps typically associated with resource provisioning, reducing human error and enhancing security by enabling version control and easy auditing of the infrastructure changes. By using CloudFormation, organizations can maintain their deployment standards while quickly scaling their applications and services, making it a fundamental tool for managing AWS resources effectively.

The other services listed, while they each provide valuable functionalities within the AWS ecosystem, do not directly provide the modeling and provisioning capabilities based on templates. AWS Lambda is primarily focused on running code in response to events, AWS Elastic Beanstalk simplifies the deployment of applications but does not utilize a template-based approach for resource management, and AWS CodeDeploy is used for automating application deployments rather than provisioning infrastructure.