Which command ensures compliance with Terraform configuration styles?

The command that ensures compliance with Terraform configuration styles is "terraform fmt." This command automatically formats Terraform configuration files (*.tf) to a canonical format and style that adheres to best practices. By doing so, it enhances readability and maintains consistency across the codebase, which is crucial when collaborating with a team or managing complex infrastructure as code.

Using "terraform fmt" helps eliminate the subjective nature of style preferences among developers, providing a standardized approach. It also allows for automatic formatting, which can be integrated into version control systems or CI/CD pipelines to enforce consistency in coding styles without requiring manual intervention.

While the other options may seem related to formatting or checking code, they do not exist as valid Terraform commands for ensuring or enforcing configuration style compliance. This reinforces the utility and importance of "terraform fmt" as the definitive command for this purpose.