Final answer:
Pronghorns can run for a longer period than cheetahs because they have a more efficient cooling system that prevents overheating during extended pursuits.
Step-by-step explanation:
A pronghorn can run for a longer period of time than a cheetah because a pronghorn has a more efficient cooling system. While the cheetah is the fastest land animal capable of reaching speeds up to 112 kilometers (70 miles) per hour, they can only sustain this speed for short bursts due to their limited cooling system. Despite their incredible top speed, cheetahs are prone to overheating and must rest after a chase. On the other hand, pronghorns may not reach the same peak speeds, but they possess a highly efficient cooling system that enables them to maintain a swift pace for much longer periods, making them excellent long-distance runners in the animal kingdom.