Which of the following is a method of integration that requires no user input to complete its tasks?

Batch processes are indeed a method of integration that operates independently of user input to complete tasks. They are designed to handle large volumes of data without requiring interaction during their execution. This method allows for scheduled or automated execution of tasks such as data imports, exports, or transformations at pre-defined intervals or in response to specific triggers, facilitating more efficient processing without needing user intervention.

In contrast, web services typically require input parameters from users or systems to function correctly. Predefined plugins, while they may automate certain aspects of integration, often rely on configurations set by users. Startable plugins are meant to be invoked in response to specific events, which inherently involves some level of user or system input to initiate their execution. Each of these alternatives necessitates some form of user engagement or setup, distinguishing them from batch processes, which run autonomously.