Answer: When an author creates a picture with words, he is using imagery.
Step-by-step explanation: Imagery is a literary device that consists in depicting objects, places or ideas by appealing to the reader's physical senses (sight, sound, smell, taste and touch). In that way, the term "imagery" makes reference to creating mental images for the reader by means of words or expressions. Imagery helps the reader to comprehend easily what the writing is trying to represent. This literary device is generally used in poetry but it can also be found in novels or short stories.