1.a/2.b/3.d/4.b all these answers are based on my opinion
Answer:
The figure of speech is personification.
"Stories are the wildest things of all" means they cannot be controlled, because they are the product of someone's free imagination. Just as we cannot regulate wild horses, we cannot regulate the stories that someone else thinks up. Once conceived in the mind, stories can go anywhere!
Personal and spiritual exploration. As in, William Wordsworth's "Imitations of Immortality".