Actions and Related Records identifies an after-save record-triggered flow . Salesforce states that this optimization should be selected when automation must perform actions after the triggering record has been saved, including updating related records, creating records, and sending notifications or email. The flow can trigger when an Opportunity changes to Closed Won, reference the related Account and Account owner, perform any required related-record operation, and invoke the appropriate email action. Fast Field Updates is a before-save configuration optimized only for changing fields on the triggering record itself. A validation rule cannot invoke an autolaunched flow, and a Screen Flow requires user interaction. Because this automation requires post-save related-record processing and an email notification, D is the Salesforce-supported architecture.

================