Under the AWS shared responsibility model for AWS Lambda, which task is the customer's responsibility?

The AWS shared responsibility model dictates that AWS is responsible for the security of the cloud, while the customer is responsible for security in the cloud. For AWS Lambda, AWS manages the underlying infrastructure, including the operating system, patching, and physical security of the data centers. Therefore, "Verifying the physical hardware in the data center" and "Patching the operating system" are AWS's responsibilities. "Stopping Lambda functions when they are no longer needed" is an operational task that falls under the customer's purview, but the most direct and fundamental customer responsibility related to Lambda is managing the actual code and configuration of their functions, as this directly impacts the application's functionality and security.