This puzzle asks you to find the single category linking five clues: Teeth, Words, Polynomial functions, Family history, and Trees (below the ground). The answer is Things with roots. The clues look unrelated on the surface but share one precise category. Read all five before guessing — the link should feel natural on every row. With only "Teeth", many categories could fit. Hold your first guess and watch what clue 2 eliminates. "Teeth" and "Words" must share one repeatable link — not a coincidence between two words. By clue 3 ("Polynomial functions"), "Things with roots" should explain all three without bending meanings. "Family history" strengthens "Things with roots" rather than opening a new theory. The final clue ("Trees (below the ground)") confirms "Things with roots" — if it still fits naturally, the category is locked. Use the Solution tab above for an interactive clue-by-clue walkthrough, or the Solved board tab for the complete answer at a glance.