Which of the following is used for tracking according to the Karlshorster Experiments?

Tracking training is specifically designed to develop and enhance a canine's ability to follow a scent trail left by a person or object. The Karlshorster Experiments emphasize the importance of teaching dogs to focus on the specific scent associated with tracking, as well as the ability to interpret and respond to various environmental cues. This method involves practical exercises that help dogs learn to pick up and maintain a scent trail over distances and through different terrains.

In contrast, the other training types do not focus primarily on the dog's ability to follow a scent trail. Narcotic detection training, for instance, is geared toward identifying substances rather than tracking their source. Odor recognition training is more about training the dog to recognize and differentiate between various scents, but not necessarily to follow them over distances. Scenario training often involves simulated situations, but does not specifically train for tracking movements based on scent. Therefore, tracking training aligns best with the principles established in the Karlshorster Experiments.