Final answer:
The decline of the era of cattle drives was attributed to the invention of barbed wire, the popularity of railroads, and the forced relocation of Native Americans.
Step-by-step explanation:
The decline of the era of cattle drives was contributed by the invention of barbed wire, the popularity of railroads, and the forced relocation of Native Americans.
The invention of barbed wire made it possible for landowners to fence off their property, preventing cattle from roaming freely and requiring them to be transported by other means.
The popularity of railroads provided a more efficient and faster method of transporting cattle, making cattle drives less necessary.
The forced relocation of Native Americans resulted in the loss of open grazing lands, which further restricted the practice of cattle drives.
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