Which service feature helps you manage multiple AWS resources simultaneously?

Resource Groups is the correct answer because this AWS feature allows users to organize and manage multiple AWS resources that share a common tag or are in the same AWS region. By creating a resource group, you can easily view and manage all relevant resources together, making it more efficient to apply actions or policies across those resources. This feature facilitates tasks such as monitoring, automation, and configuration changes by grouping resources that might otherwise be managed individually.

AWS Lambda, while an important service for running code in response to events, does not directly help manage multiple resources simultaneously. Its primary function is executing code without the need to provision or manage servers.

AWS CloudFormation is a service for defining and provisioning AWS infrastructure as code. While it allows for the deployment of multiple resources defined in a single template, it does not serve as a management interface for existing resources. It is more about creating and configuring rather than managing them post-deployment.

AWS Inspector provides automated security assessments for applications deployed on AWS. Its focus is on identifying vulnerabilities and compliance issues rather than managing multiple resources simultaneously.