Answer:
(D) retrieval cue
Explanation:
Retrieval cue: In psychology, the term "retrieval cue" is described as a prompt that assist an individual to remember different things. When an individual tends to make specific new memories then he or she ought to include a few information related to the given situation as well in which those memories are being developed so that it acts as a trigger to approach the given memories.
Retrieval cues help an individual to approach memories that are being stored in his or her long-term memory and therefore helps to carry-out those memories into his or her "conscious awareness".
In the question above, the picture served as a powerful retrieval cue.