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.
Answer:
Black History Month celebrates the contributions, achievements, and sacrifices of African Americans to the United States and the world. The perspectives, experiences, and discoveries of African Americans were not integrated into our education.
Explanation: