A company needs to replicate existing AWS resources by using templates.

AWS CloudFormation enables infrastructure as code by allowing a company to describe AWS and supported third-party resources in template files. A template acts as a repeatable blueprint that defines the resources to create and their relevant properties and relationships. CloudFormation uses the template to provision and configure a stack, which allows the same infrastructure definition to be deployed consistently in another environment, account, or Region. AWS also provides an infrastructure-as-code generator that can scan eligible existing resources and generate a template that can be used to bring those resources under CloudFormation management or replicate them. Therefore, option A is correct. AWS Step Functions coordinates distributed application components and workflows by using state machines; it does not replicate infrastructure from resource templates. Amazon CloudFront is a content delivery network that caches and delivers content through edge locations. AWS CloudTrail records account activity and API events for auditing and governance. Neither CloudFront nor CloudTrail is an infrastructure provisioning service. The exam clue is “using templates”: AWS CloudFormation templates define resources and make repeatable, controlled infrastructure deployments possible.