Final answer:
Imagery can be powerful when the reader can picture it clearly.
Step-by-step explanation:
Imagery can be powerful even if it is purely imaginative or 'unreal' when the reader can picture it clearly. In literature, vivid and detailed descriptions can transport the reader into the world of the text, making the imagery feel real and engaging. By creating a mental image that is clear and visual, the reader is able to experience the emotions and sensations evoked by the imagery, regardless of whether it is based on reality or pure imagination.
Learn more about power of imagery in literature