What is a potential trigger type that could be used for periodic tasks in Flow Designer?

A schedule-based trigger is particularly suitable for periodic tasks in the Flow Designer. This type of trigger allows you to define specific intervals at which a flow should run automatically, such as daily, weekly, or monthly. By utilizing a schedule-based trigger, you can efficiently manage routine processes without the need for manual intervention, making it ideal for tasks like generating reports, backups, or automated notifications that need to occur at specific times.

Other options, such as record-based triggers, are mostly event-driven and activate based on changes to specific records within the system, rather than on a regular schedule. Application triggers are specific to certain events within an application but do not cater to time-based requirements. Meanwhile, manual triggers require user initiation, making them unsuitable for the automation of tasks that need to happen periodically. Thus, the schedule-based trigger stands out as the correct choice for automating periodic tasks within Flow Designer.