Determine the best location for a proposed topic sentence. Which insertion point makes the relationship between Paragraph 1 and Paragraph 2 most coherent? Treat quotations, events, and observations as possible setup rather than automatic topic sentences. Paragraph 1: Archaeologists are stabilizing a hillside site where rainfall has exposed parts of old walls. The project summary describes the initial work before presenting the ongoing priority. Paragraph 2: [1] The team first documented every visible stone before moving loose material. [2] Workers then covered fragile wall tops with a reversible protective layer. [3] After temporary channels redirected runoff, engineers measured how water moved during two storms. [4] Continued drainage monitoring is necessary because small shifts in runoff can undermine a repaired section. Sensors and photographs will be compared after each period of heavy rain. Sentence to insert: "Long-term protection depends on tracking water movement after the visible repairs are complete."