Which command is used to show the changes that will be made to the infrastructure?

The command used to show the changes that will be made to the infrastructure is "terraform plan." This command performs a dry run of your Terraform configuration, allowing you to see what actions Terraform will take to reach the desired state defined in your configuration files. It compares the current state of your infrastructure with the desired state specified in the configuration and outputs a detailed summary of the proposed changes, including any resources that will be created, modified, or destroyed.

Utilizing "terraform plan" is crucial for understanding the implications of your configurations before making any changes. It helps to prevent unintended changes and ensures that your deployment process is predictable and controlled. By reviewing the plan output, you can validate that the actions Terraform is poised to take align with your intentions.

The other commands serve different purposes: "terraform apply" is used to apply the changes to the infrastructure, "terraform validate" checks the syntax and validity of your configuration files, and "terraform show" displays the attributes of existing resources or the output from the last terraform plan or terraform apply.