Fact 1: Male dogs use pheromones in urine to mark their territory.

Fact 2: Pheromones are a sub-category of semiochemicals.

Given the two facts above, answer the question "What uses semiochemicals in urine to mark territory?" with the following options: 
- koalas
 - bacteria
 - humans
 - dogs
 - bears
 - cats
 - the Sun
 - rabbit


 

    dogs     