What uses semiochemicals in urine to mark territory?\nOptions:\n- (A) koalas\n- (B) bacteria\n- (C) humans\n- (D) dogs\n- (E) bears\n- (F) cats\n- (G) the Sun\n- (H) rabbit
Step-by-step reasoning process below:
(D)
Male dogs use pheromones in urine to mark their territory.

Pheromones are a sub-category of semiochemicals.

Male dogs use semiochemicals in urine to mark their territory.

.

Final answer: (D)