Answer: Retrieval cue.
Explanation: Retrieval cues are scenarios, events or stimulus which triggers a person's memory. It aids or assist in recalling information stored in a person's long term memory. It also assist or aids in awareness or bringing hidden or forgotten task into cognizance by observing or encountering stimulus or events similar to such task.
Marco's memory about an unfinished laundry chores was triggered by observing a stimulus of laundry commercial.
