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

Fact 2: All animals emit pheromones to mate.

Given the two facts above, answer the question "Male dogs use urine to mark their territory the same way as they find what" with the following options: 
- H 2 O
 - humans
 - food
 - shelter
 - a path
 - abcess
 - mates
 - water


 

       mates  