You need a serverless, automated mechanism to invoke an AWS Lambda function every 10 minutes. Which solution is appropriate?

Creating an Amazon EventBridge rule with a schedule expression is the most appropriate serverless and automated solution. EventBridge (formerly CloudWatch Events) allows you to define schedules using cron or rate expressions (e.g., rate(10 minutes)) to invoke Lambda functions directly. This is a fully managed service, requiring no server provisioning or maintenance. Launching an EC2 instance with a cron job is not serverless and introduces operational overhead. Setting an environment variable on the Lambda function does not provide a scheduling mechanism; environment variables are for configuration, not for triggering. An Amazon SNS topic is a messaging service, not a scheduler; while it can invoke Lambda functions, it lacks built-in scheduling capabilities.