Scientists use surface waves to find an earthquake's epicenter.
Answer: B) surface
Since 'sullen' and 'moody' mean almost the same, we should find a word that has a similar meaning to 'monotonous'. The word that has the closes meaning to it is 'repetitious', meaning 'tedious, boring, dull'.
Answer:
Robert Frost's poem “The Road Not Taken” discusses the choices that a person may face in his life. The tone of the poem is serious and does not necessarily have an optimistic outlook. On the other hand, the poem is not about good and evil. It is about selecting the right approach to life through making decisions.
His use of repetition in the excerpt stresses how serious he is about what he's saying and shows how strong is his plea for peaceful action.