Region :
It is a Physical location around the global where AWS have datacenter.
Availability Zone:
It is one or more data centers within a region.
Data center:
A Data Center is the actual physical facility that holds servers, networking, storage, and power infrastructure.
Region :
AWS implements strong security measures across its global infrastructure, including physical security like 24/7 surveillance and biometric access at data centers. It uses network security such as encryption, firewalls, and isolated virtual networks.
AWS supports disaster recovery and business continuity through its global infrastructure of multiple regions and Availability Zones. It enables automatic data backup and cross-region replication. This ensures minimal downtime and keeps customer services running even during disasters.
AWS regions or Availability Zones are interconnected by redundant cables.it is used to stay connected.