Answer: AWS Lambda

AWS Lambda is a serverless compute service that allows you to run code without provisioning or managing servers. It automatically scales and executes code only when needed, from a few requests per day to thousands per second. In contrast: - **AWS EC2** requires manual server provisioning and management - **AWS Config** is a configuration management service - **AWS Opswork** is a configuration management service for Chef and Puppet AWS Lambda follows the serverless computing model where you only pay for the compute time you consume.

Author: Ritesh Yadav