When a user edits the postal Code on an Account, a custom Account text field named. Timezone` must be updated based on the values in a PostalCodeToTimezone_c custom ogject. Which two automationtools…

An Approval process is designed for approving records, not for automatically updating fields based on other record data.

A record-triggered flow set for "Fast Field Updates" (before-save) can efficiently update fields on the triggering record based on related record data (like a custom object lookup) without consuming extra DML statements.

Quick actions are used to create or update records, log calls, or launch flows from specific UI contexts, but they do not automatically update fields when a record is edited.

An Apex trigger on the Account object (before update) can query the custom object based on the new postal code and update the Timezone field before the record is committed to the database.