Which of the following describes Execution Policies in AWS Lambda?

The correct answer focuses on the role of execution policies in AWS Lambda, which is closely tied to permissions. Execution policies are essentially part of the AWS Identity and Access Management (IAM) framework and define what actions a Lambda function is allowed to perform when it is invoked. This includes permissions to access resources such as databases, other AWS services, or even S3 buckets.

In practical terms, when a Lambda function is executed, it runs under a specific IAM role defined by the execution policy, allowing it to acquire necessary permissions to interact with various AWS resources securely. This ensures that the Lambda function operates within the prescribed permissions, adhering to the principle of least privilege and maintaining security.

Understanding this aspect is crucial for anyone deploying Lambda functions, as improper execution policies can lead to failed executions or potential security vulnerabilities. Therefore, the ability to grant the appropriate permissions when a function is invoked is what defines execution policies in the context of AWS Lambda.