Answer: D. well-defined characters suggested by actual experience
Manifestation is where your thoughts and your energy can create your reality. If you are constantly being negative and feeling down, then you are going to attract and manifest negative energy.
One of the topic that you could use in your essay is the Literary device that Tolstoy use in writing his novel. This include many aspect of literature , such as epigraph , imagery, foreshadowing, metaphor, point of view, personification, structure, etc
hope this helps