Which service facilitates the orchestration of multiple AWS services?

AWS Step Functions is the service that facilitates the orchestration of multiple AWS services by allowing you to design and run workflows that stitch together various services into a cohesive application. It enables developers to coordinate various AWS components such as AWS Lambda, Amazon ECS, and many others by defining state machines that represent sequences of tasks and the conditions for moving between them. This service simplifies complex application builds and enhances the ability to manage state, while providing built-in error handling, retries, and parallel processing.

Using AWS Step Functions, you can visually map out workflows and manage dependencies between tasks, which is particularly useful when orchestrating microservices or complex processes that require interactions between multiple AWS services. This orchestration capability allows for improved reliability and better tracking of execution states, leading to more efficient cloud application development.

Other options may provide valuable functionalities, but they do not serve the specific role of orchestrating multiple services in the same way as AWS Step Functions.