Final answer:
Without the specific text, it is difficult to precisely identify the shift in the speaker's focus at line 28; however, the context suggests it could be either a transition to enjoying the present beauty of nature, or a reflection on the nature of boundaries.
Step-by-step explanation:
Question 7 line 28 ("spring . . . wonder") refers to an excerpt from a work that is not provided here, thus making it difficult to give a definitive answer to the question. However, based on the accompanying text and typical literary analysis of shifts in focus, if the text provided includes a transition from reflection, planning, or thought about the future to a present engagement with nature or the realization of current beauty, then option 2) enjoying the beauty of the day instead of working would be a likely candidate. Similarly, if the text pivots from interactions or thoughts about another character to introspective consideration about barriers, either physical or metaphorical, then option 4) speculation about the nature of fences and boundaries might be the correct choice. Understanding of these shifts often requires a full context of the preceding and following text, which is not fully available here.