In terraform, the main elementes of configuration files are (fill out missing occulsion, note that the two occulsions are for same element, so looking for single answer here):

<BLOCK TYPE> " [...] " " [...] " {
# Block body
<IDENTIFIER> = <EXPRESSION> # Argument
}

In terraform, the main elementes of configuration files are (fill out missing occulsion, note that the two occulsions are for same element, so looking for single answer here):

<BLOCK TYPE> " [...] " " [...] " {
# Block body
<IDENTIFIER> = <EXPRESSION> # Argument
}

BLOCK LABEL

^^ each block type can have 0 or more block labels, e.g. resource blocks ususally have 2 labels while variable blocks have just 1:

resource "aws_instance" "example" {
  ami           = "ami-b374d5a5"
  instance_type = "t2.micro"
}

variable "region" {
  default = "us-east-1"
}