Both are great ways to help improve your vocabulary and spelling. However I would suggest frequent reading to familiarize yourself with the words.
The answer to the question above is the second option: …starry skies; … From Byron's poem "<span>She Walks in Beauty", this is the phrase the contains sibilance. So in literature, sibilance is one of the literary devices that is used in poems which creates a "hissing" sound and mostly stresses on consonant sounds. Commonly, sibilants include the sounds of "es" or "sh" and "zzz" sounds.</span>
They often spoke in Free Verse
Well from expirenaces it would be #3