Which factor primarily affects the scent cone dispersion in windy conditions?

The strength of the wind primarily affects scent cone dispersion in windy conditions due to its ability to carry or disperse scents over a wider area. When wind is present, it can alter the path of the scent particles, causing them to spread out more than they would in calm conditions. This dispersion can lead to the scent being detected by the canine at a greater distance from the source or being diffused across a larger area.

In contrast, factors such as the size of the K-9 or the type of scent being tracked do not influence how the wind interacts with the scent particles. While a dog's training level is crucial for their performance, it doesn't change the way wind affects scent dispersion. In essence, understanding the primary role of wind strength is critical for effectively utilizing tracking dogs in variable weather conditions, as it directly impacts the dog's ability to locate scents accurately.