Concept:Imagery is the use of descriptive language to create a vivid mental picture.
Explanation:An expression that helps a reader form a mental image is called imagery.
It appeals to the senses, such as sight, sound, or touch.
Among the given options, imagery directly refers to this idea.
Paradox and exaggeration do not create mental pictures.
Photography is a visual medium, not a literary expression.
Therefore, the correct choice is imagery.
Answer:C. imagery