How does imagery make a literary work more effective? question 4 options: images lend a fast-paced feeling of action to a narrative.
images allow authors to state their themes explicitly.
images make it easier for readers to remember the author's words.
images create mental pictures of people, places, and objects.

The correct answer is D. Images create mental pictures of people, places, and objects.

Imagery is the usage of few, very descriptive words, which are there to help readers visualize the scene more easily. These words create vivid, mental images in readers, so that they can imagine what's being described without too much effort.

Therefore, imagery is used to create various mental images, be those of objects, places, people, or anything else, so the answer has to be D.

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.