Which mechanism allows an embedded guide to trigger another process upon completion?

The correct choice is Callbacks. In the context of data integration and automation processes, a callback mechanism is designed to execute specific actions or functions upon the completion of a previous task. This is essential in scenarios where the next step in a workflow needs to be initiated only after the successful completion of a prior step, ensuring that processes depend on the availability and readiness of data or tasks that were just executed.

Callbacks are particularly useful for handling asynchronous tasks, allowing the system to efficiently manage operations without needing to wait synchronously for a previous task to complete before moving on to the next. By leveraging callbacks, an embedded guide can trigger the next process based on the outcome or completion status of the initial task, effectively enabling dynamic workflows that adjust according to real-time conditions and statuses.

Utilizing callbacks helps streamline operations and reduces the possibility of errors that could arise from attempting to start a new process before the previous one is reliably finished. Thus, callbacks enhance the overall efficiency and reliability of data integration workflows.