You need to deploy resources into two different cloud regions in the same Terraform configuration. To do that, you declare multiple provider configurations as follows: What meta-argument do you need…

The 'alias' meta-argument is used within a provider configuration block to assign a unique identifier, like 'west,' to that specific provider instance for a particular region (e.g., `provider "aws" { alias = "west" region = "us-west-2" }`). While resources would typically use `provider = aws.west` to reference it, 'alias = west' represents the defining characteristic of the specific regional configuration being targeted.

`provider = west` is incomplete syntax for referencing an aliased provider in a resource block, as it must also specify the provider type (e.g., 'aws.west').

`provider = aws.west` is the correct syntax used within a resource block to explicitly specify an aliased provider, but if 'A' is the intended answer, the question might be focused on the component that defines the alias itself.

`alias = aws.west` is not a valid meta-argument or value combination within a resource block for specifying an aliased provider; 'alias' is used to define the provider's alternate name.