The answer is motif :) any reoccurring theme, pattern, idea, image etc. in a work applies to this. for example, an artist that includes flowers in across all of their work (or a series of it) would be depicting a floral motif. I hope this helps!!
Well, judging on the words you gave, I'd have to say B. Thou and Know. I'm only basing this on my memory, so I could be wrong! I hope I gave you some help!
