One factor was barbed wire. As farmers and ranchers wisened up, they used the wire to fence in their cattle, destroying the use of cowboys, and taking away one aspect of the "wide open west". Herds of cattle took over the plains and destroyed the grass. In 1883 the big drought struck and water streams dried up and prairie fires grazed. Also the barbed wire and the natural disasters.
Im pretty sure its true but not 100% correct .
Answer:
The Alps act as a natural boundary between Italy and the rest of Europe. This has affected much of European history, especially with the Romans.
Answer:
they needed more raw materials to fuel their mass production and population growth. they would exploit natural resources and fight for what they could get. if that makes any sense
Explanation:
The correct answer is option D. "Companies replaced hand-operated brakes with air brakes on trains". The development of air brakes on trains was a significant improvement of railroad safety. Air brakes function much more faster than hand-operated brakes, because hand-operated brakes required that the brakemen turned the brakes in one car and jump to the next to set the brakes on, and so on.