AWS Lambda resource policies are utilized for what purpose?

AWS Lambda resource policies are designed to grant cross-account access, which enables you to specify who can invoke your Lambda functions. This means that with a resource policy, you can allow specific AWS accounts, services, or users to access and run your Lambda functions, even if they are located in different AWS accounts.

This capability is particularly useful in multi-account scenarios where various AWS accounts may need to invoke functions for processing data, performing analytics, or integrating different services. By using resource policies, you establish a security posture that controls access to your Lambda functions, ensuring that only authorized identities can trigger execution.

The other options do not accurately describe the function of resource policies. Monitoring logs pertains more to AWS CloudWatch and does not involve resource policies. Modifying function behavior is typically handled through configurations and code within the Lambda function itself, rather than through access policies. Rate limits are generally managed through AWS services like API Gateway or AWS Step Functions, rather than through Lambda resource policies. Thus, enabling cross-account access through resource policies is the core purpose they serve in AWS Lambda.