The answer is "literal image."
For instance, if a tree is just a tree and stays a tree in a story then it's a literal image. If the tree represented a character's dreams or if the story has a motif of trees then it would not be literal because it has a second meaning beyond just being a tree.
The phrase "crying there all night" may suggest that the narrator is feeling very sad and forlorn.
Answer:
The narrator sees that one path is overgrown and clearly not used very often. He thinks that this path is a better choice and decides to take the less desirable path. He chooses it because fewer other people have seen it or experienced it.
Explanation:
The answer is A: a voyage.
In this poem, Emily Dickinson is comparing reading to a voyage, to travelling, by making it seem that reading is like embarking a strong and powerful vessel (the frigate) towards unknown places; or like riding a beautiful horse (the coursers) across a lovely field (poetry); and all of this without any cost or harm to the reader (anyone can read and embark on this wonderful trip).