The correct answer to this question is the outside. There are many parts of the dog that have hair, including the dog's ear and nose. The exterior of the dog is the most visible, which is why it has the most hair. Several dogs are known for the amount of hair they have. One dog known for their hair is German Shepards.
Their hair usually is soft, but they shed tremendously. Another dog known for their hair is Siberian Huskies, who are also known for their high levels of shedding. Other dogs known for their hair include Pomeranians and Siberian Huskies.