GCP Project & Resource Hierarchy Mastery Hub: The Industry F

Within the GCP Resource Hierarchy, what is the fundamental unit of organization and billing, and how does its placement impact resource access and policy inheritance?

Consider a scenario where a global security policy needs to be applied to all compute instances across several distinct business units within an enterprise. Which level of the GCP Resource Hierarchy is most appropriate for enforcing this policy at the highest possible scope, ensuring consistent application without manual intervention per business unit?

A company is migrating its legacy applications to GCP and needs to ensure that all new projects created by development teams adhere to specific compliance standards, including the restriction of certain sensitive regions and the mandatory use of specific logging configurations. Which GCP Resource Hierarchy feature is best suited to enforce these requirements automatically at the time of project creation?