Answer:
Railroads
Explanation:
Immigrants from China worked mostly as agriculture laborers on railroad construction.
Coming and going from the forest were beef and pork and lard, buffalo robes and bear hides and deerskins, lumber and lime, tobacco and flour and corn. It was the cotton bales and hogsheads of sugar, stacked high on the levee, however, that really made the New Orleans economy hum.
Penicillin was so important because it was proven to reduce the amounts of deaths amputations and surgeries during world war1
The development of the efficient agricultural practices including understanding the nile rivers flooding patterns where they grew their crops as it has the rich black soil changed Egyptians work life through efficient practices in agriculture that made the workforce available for other ventures.
