Which task is the responsibility of the customer according to the AWS shared responsibility model?

Explanations:

Maintaining the security of the hardware that runs Amazon EC2 instances is the responsibility of AWS, as it falls under the infrastructure security managed by AWS.

Patching the guest operating system of Amazon EC2 instances is the customer’s responsibility. Users must manage the operating system and any applications running on it.

Protecting the security of the AWS global infrastructure is an AWS responsibility, as it pertains to the underlying infrastructure and data centers.

Patching Amazon RDS software is managed by AWS. Customers can configure their databases but do not need to handle the underlying software patching.