Respuesta :

I believe the answer is Barbed Wire.
Befor the inventions of barbed wire, the Cattles are let to roam freely across the plains and the owners are required to pay a lot of cowboys to supervise them so they didn't go missing. Witht he invention of barbed wire, they can keep the cattle in a secure place without supervision.

Invention of ‘Barbed Wire’ effectively ended the era of the cowboys long drives and the open range system.

Further Explanation:

Open range is a rangeland where cattle tend to roam freely in any land regardless of land ownership or who owns that land. In many places of United States and Canada,  There are laws related to open Range and the people or land owners who done want any cattle to roam or gaze on their lands must erect ‘Fence’ in the boundary of their property in respect to keep animals out. This open range law is implemented not only in fields but on public roads also. Majority of people in Canada are needed to erect fences in or herd their livestock. Then came the ‘Barber Wire’.The Invention of ‘Barbed Wire’ effectively ended the era of the cowboys long drives and the open range system. With Barbed Wire, It was more practical to fence the livestock out of the developed Land so that cattle don’t enter it for gazing and destroy that developed land. These Barbed wires also prevented cattle to overgraze. The invention of Barber wife also made fencing cheaper as it was much on the lower side of the cost than to hiring Cowboys to handle cattle.  

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Answer details:

Grade: High School

Subject: History

Chapter: Barbed Wire

Keywords: Barbed Wire, Cowboys, Cattle, Invention, Livestock, Canada, United States, Fencing, Gazing, Lands.