During the Western expansion, which cultural influence helped ranchers learn about cattle industry practices?

The correct answer is Mexican ranchers because during the period of Western expansion, they played a significant role in shaping cattle industry practices in the American West. The vaquero tradition, which originated from Mexican cattle herding techniques, introduced various practices such as roping, riding, and branding that became integral to ranching in the United States. Mexican ranchers brought with them valuable knowledge of cattle management, including the care and handling of livestock, horsemanship, and the development of ranch infrastructure.

This cultural exchange was essential for American ranchers who were just beginning to establish their operations and learn the intricacies of cattle ranching. The influence of Mexican ranching practices is evident in the terminology, tools, and even the lifestyle of cowboys in the American West, making it a crucial component of the cattle industry's evolution during this time.