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

Fact 2: During Urination Dog's urine is used as a scent marker for other dogs.

Given the two facts above, answer the question "How do male dogs mark their territory?" with the following options: 
- Chemical energy
 - Hot dog eating contest
 - Adequate signage
 - with their fur
 - Scent marker
 - heat produced
 - mate with females
 - Paint


 

     Scent marker    