Under the AWS shared responsibility model, which of the following is an AWS responsibility?

Under the shared responsibility model, AWS is responsible for "security of the Cloud," while the customer is responsible for "security in the Cloud." Protecting the physical network infrastructure, including the global infrastructure, regions, Availability Zones, and edge locations, is an AWS responsibility. Encrypting an application's data, authenticating an application's users, and configuring application firewalls are all customer responsibilities, falling under the "security in the Cloud" domain. These tasks involve managing data, user access, and application-level security, which are within the customer's control and configuration.