Final answer:
The success of Native Americans in animal fights and conflicts with other tribes or European settlers was due to their adaptability and strategic use of new resources like horses and firearms introduced by Europeans, which enhanced their efficiency in hunting and warfare.
Step-by-step explanation:
The reasoning behind the Native Americans' success in animal fights, which can also include conflicts with other tribes or European settlers, stemmed from a variety of adaptations and innovations following the introduction of new resources by Europeans. The adoption of the horse, for instance, revolutionized the way Native American tribes of the Plains hunted and engaged in warfare. With the Spanish introduction of the horse in the 1500s, these tribes became highly efficient hunters and warriors. No longer needing to drive bison over cliffs in large quantities, they could follow and hunt them more selectively with the mobility provided by horses.
The early adoption of European technologies such as firearms and metal tools also gave Native Americans a critical advantage in their confrontations. The changes to the environment caused by European demand for furs, and the social changes from trading with Europeans, added complexity to Native American ways of life. Their ability to trade and adapt to other cultures was a significant aspect of why they sometimes emerged victorious in various confrontations, including animal fights and tribal warfare
Ultimately, while Native American tribes certainly faced devastating losses and displacement due to European colonization, their initial successes in animal fights and conflicts can be attributed to their adaptability and the strategic adoption of technology such as the horse and firearms, which enhanced their hunting and combat capabilities.