Final answer:
The left lung in horses consists of just one large lobe.
Step-by-step explanation:
The animal in which the left lung consists of just one large lobe is the horse.
In most animals, the left lung is smaller and has fewer lobes than the right lung. However, in the horse, the left lung consists of only one large lobe, while the right lung has several smaller lobes.
This unique structure allows horses to have a more efficient respiratory system, which is necessary for their large size and high physical activity.