Which dog was put into the lead position?

In "The Call of the Wild," Sol-leks is placed in the lead position due to his experience and temperament suitable for leadership. As a seasoned sled dog, Sol-leks demonstrates both reliability and a strong sense of the trail. In contrast to other dogs in the team, he has a calm demeanor and understands the demands of the job, making him a strategic choice for leading the team through challenging conditions.

Others like Dave, Joe, and Hal may have their strengths and characteristics, but they do not possess the combination of experience and steadiness that Sol-leks provides. Dave, while strong and dedicated, might not have the necessary leadership qualities, as he often focuses on his own work rather than guiding the team. Joe is known for being more brash and less dependable in a leadership context, and Hal, a human character, is not a dog and thus cannot fulfill the role of a lead dog.