Question to you: What do dogs use to mark their territory?\nOptions:\n- (A) water\n- (B) Chemicals\n- (C) layers of fat\n- (D) food\n- (E) Animal fur\n- (F) heat energy\n- (G) Scratches\n- (H) heat produced.
Let's reason step-by-step:
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Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use chemicals to mark their territory. Final answer: (B).
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