If you manually accidentally delete a cloud resource (like an EC2 instance) outside of Terraform, what will happen on the NEXT 'terraform plan'?

What is the primary function of the 'terraform state'?

In AWS, if two developers attempt to run 'terraform apply' simultaneously against an S3 remote backend, what mechanism prevents state corruption?

If you have an existing S3 bucket created manually via the AWS Console, and you want Terraform to manage it, what command do you use?

Which of the following best describes the primary advantage of using Terraform State in a production environment (Scenario 1)?