From your laptop you must deploy resources with Terraform using a service account; your Cloud Identity has iam.serviceAccountTokenCreator. Following Google best practices, how should you configure your local environment to act as that service account?

The correct answer describes service account impersonation, a Google best practice for local development. By configuring gcloud to impersonate the service account, your personal credentials are used to obtain short-lived tokens for the service account, eliminating the need to store sensitive key files locally. This enhances security by reducing the risk associated with long-lived credentials. Option 1 (downloading a key file) is less secure as it involves storing a long-lived credential directly on your laptop, which is not a best practice. Option 3 (gcloud auth application-default login) authenticates as your personal identity, not the service account. Option 4 (Hashicorp Vault) is a valid solution for managing secrets in a production environment but is overly complex for configuring a local development environment to act as a service account, especially when a simpler, built-in gcloud impersonation method exists.