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
Step-by-step reasoning process below:
(B)
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.

.

The answer is (B)