Which of the following services can integrate with AWS Lambda to trigger executions?

AWS Lambda is a serverless computing service that executes code in response to events and triggers. Among the listed services, AWS CloudWatch is specifically designed to monitor and manage AWS resources and applications, and it can be configured to trigger Lambda functions based on specific CloudWatch events, such as changes in resource states or alerts from monitoring metrics.

For instance, you can set up a CloudWatch rule that invokes a Lambda function whenever an event occurs, such as a log entry is generated or a specific metric crosses a defined threshold. This integration makes it highly effective for automating responses to changes in your environment.

In contrast, while the other choices may have their own integrations and functionalities within the AWS ecosystem, they do not serve the same purpose of directly triggering Lambda executions based on events. AWS CloudFormation is used for infrastructure as code, AWS CodeDeploy is for deploying applications, and AWS RDS is for managed database services. None of these are inherently designed to generate events to invoke Lambda functions like CloudWatch does.