Which trigger is used to validate form fields during the record save process?

The trigger used to validate form fields during the record save process is the "Before User Submit." This trigger fires right before the form data is sent to the server for processing when a user submits a record. It allows developers to run validation checks on the form fields to ensure the data complies with the business rules or constraints established in the system.

This trigger is crucial for preventing poorly formatted or invalid data from being saved in the database, which can lead to data integrity issues. For instance, if required fields are empty or if fields contain data that does not match the expected format, the developer can implement logic in this trigger to alert the user and prevent the save from occurring until the issues are resolved.

The other options, while relevant to the record processing lifecycle, do not serve this specific purpose. "Before User Edit" pertains to actions taken when a user is about to edit a record, "After Record Submit" happens after the record has been processed and saved, and "Before Record Load" refers to actions taken before a record is displayed, rather than during the submission process.