Answer:
chemical communication.
Step-by-step explanation:
There are four different methods or ways through which an animal communicates including tactile, visual, chemical, and auditory. A few animals depend on more one form of communication rather than others. These methods are being used by animals to ward off threats, show affection, and/or attract towards a mate.
Chemical Communication: The term chemical communication is defined as a method through which an animal communicates with that of other animals or species. An animal often leaves scent to signify territory or attract a mate.
In the question above, the dog's behavior is an example of chemical communication.