Answer: C. form a mental picture.
In vivid imagery, all senses are used in describing a subject in a writing piece. To help the reader in forming a mental picture, vivid imagery is used. Vivid imagery is a very effective way of describing something to the audience or reader. The sense of touch, sight, smell, taste, and hearing are used to describe something in a writing piece and this enables the reader to have a clearer idea of what the writer is describing.