The correct statements are An Availability Zone consists of one or more physically separate data centers and AWS Regions generally include at least three Availability Zones.

An Availability Zone consists of one or more physically separate data centers are built from multiple discrete facilities so they avoid single points of failure and they provide low latency network connectivity for applications inside the same region. AWS Regions generally include at least three Availability Zones are designed with multiple AZs so architects can place resources across AZs for high availability and fault isolation and many regions include three or more AZs to support resilient architectures.

Availability Zones depend on one worldwide data center is incorrect because Availability Zones are local to a Region and they are not a single global facility.

Data centers within an Availability Zone are always in the same building is incorrect because AZs comprise physically separate data centers and those facilities are typically in different buildings to reduce correlated failures.

AWS Local Zones is not an answer to how Regions and Availability Zones are organized because Local Zones extend a Region by placing compute and storage closer to users and they do not change the fundamental Region and AZ structure.

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