How do you define dependencies between resources in Terraform?

In Terraform, dependencies between resources are defined through both implicit and explicit methods.

Implicit dependencies occur automatically based on the references made in resource configurations. For example, if one resource references the output of another resource, Terraform understands that it needs to create the referenced resource first before the dependent resource can be created. This automatic management of dependencies helps in avoiding issues like trying to access a resource that hasn't been created yet.

Explicit dependencies, on the other hand, are defined by using the depends_on argument within a resource block. This is useful when you want to explicitly dictate the order in which resources are created or destroyed, regardless of whether there are direct references between them. For instance, if you have a resource that must be fully initialized before another can start, using depends_on ensures that the correct order is respected.

Using both implicit and explicit methods allows Terraform to effectively manage complex infrastructure setups, ensuring resources are acted upon in the right sequence according to their dependencies. This dual approach is what makes option B the correct choice.

Other choices do not accurately capture how dependencies are defined in Terraform. Explicit instructions alone do not account for the automatic handling of dependencies. Environment variables are not a mechanism for defining resource relationships. Naming conventions may help in organizing