If you have created a VM with Terraform and want to delete it, what should you execute?

To delete a virtual machine created with Terraform, the correct command to execute is terraform destroy. This command is specifically designed to remove all the resources that are defined in your Terraform configuration. When you run terraform destroy, Terraform analyzes the state of the resources it has created, compares it with the configuration, and then proceeds to delete those resources from the infrastructure.

This command ensures that the lifecycle of the resources is managed appropriately, maintaining the integrity of the state file, which is crucial for future operations. After execution, Terraform updates the state file to reflect that these resources no longer exist, preventing any discrepancies in future runs.

In contrast, the other options do not correspond to valid Terraform commands for resource deletion. For instance, terraform remove and terraform delete are not recognized commands within Terraform's CLI. terraform plan -destroy also does not perform the deletion; it would only generate an execution plan for resources that would be destroyed, without actually carrying out the deletions. Understanding these specific commands helps in effectively managing resources using Terraform.