If a workflow rule contains only field updates, Migration to Flows converts it into which of the following flows?

When a workflow rule consists solely of field updates, its migration to Flows results in a Fast Field Update (Before-Save) Flow. This type of flow is executed before the record is saved, allowing for immediate field updates without the need for a user to interact with the system.

The reason this is the correct answer lies in the efficiency and immediacy needed for field updates. A Fast Field Update ensures that any modifications made to a record's fields happen instantly as part of the save operation, enhancing performance. It’s designed for scenarios where updates should occur without user intervention, mirroring the original intention of the workflow rule.

Other flow types, such as Screen Flows and Scheduled Paths, serve different purposes. Screen Flows involve user interaction, guiding users through a series of screens, while Scheduled Paths are used to perform actions at a specified time after a record is triggered, neither of which applies to the straightforward nature of a workflow rule solely focused on field updates. A Record-Triggered Flow might seem relevant, but it includes scenarios where additional logic or user interaction might be needed, which is not the case here. Thus, the nature of a Fast Field Update aligns perfectly with the requirements of a workflow rule that only performs field updates.