What is the purpose of a Terraform workspace in either open source of enterprise?

In a Terraform Cloud workspace linked to a version control repository, speculative plan runs start automatically when you merge or commit changes to version control.

You have been given requirements to create a security group for a new application. Since your organization standardizes on Terraform, you want to add this new security group with the fewest number of lines of code.
What feature could you use to iterate over a list of required tcp ports to add to the new security group?

A user runs terraform init on their RHEL based server and per the output, two provider plugins are downloaded: $ terraform init Initializing the backend...
Initializing provider plugins...
- Checking for available provider plugins...
- Downloading plugin for provider "aws" (hashicorp/aws) 2.44.0...
- Downloading plugin for provider "random" (hashicorp/random) 2.2.1...
:
Terraform has been successfully initialized! Where are these plugins downloaded to?

Complete the following sentence:
The terraform state command can be used to ____