All of these played important roles!
The mining industry enabled the excavation of many important and precious minerals which wre later used in differetn technological applciations.
The railroads increased the speed by which things were being transmitted.
The cattle business enabled people to sustain themselves through food.
The homestead act enabled people to become self-sufficient.
They had been hunting mammoths. They had followed them from Asia to North America.
Explanation:
this the for your question
