Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
The early railroad provided a means of transportation for people and goods faster and more efficiently <span />
Because Hispanics in the American Civil War fought on both the Union and Confederate sides of the conflict. Not all the Hispanics who fought in the American Civil War were "Hispanic-Americans", in other words citizens of the United States. Many of them were Spanish subjects or nationals from countries in the Caribbean, Central and South America.
The main cause of death in the civil war was disease.
Clothes were not clean
Food was not sanitary
It was not a fun place
The answer is all of the above
