You are presented with the question "What uses semiochemicals in urine to mark territory?" and the following answer choices: 
- koalas
 - bacteria
 - humans
 - dogs
 - bears
 - cats
 - the Sun
 - rabbit

Now knowing that male dogs use pheromones in urine to mark their territory and pheromones are a sub-category of semiochemicals, choose the best answer.


 

    dogs     