Question

vivid imagery is often used to help the reader
identify the plot structure.
connect the ideas.
form a mental picture.
recognize the dialogue.

Explanation:

Vivid imagery in writing uses descriptive language to create sensory experiences. The purpose of vivid imagery is to enable readers to visualize or form a mental picture of what is being described. Identifying plot structure relates to analyzing story elements, connecting ideas is about coherence, and recognizing dialogue is about distinguishing spoken parts—none of these match the function of imagery.

Answer:

C. form a mental picture.