Answer:
They make many state borders, like the Mississippi river, for example. It forms many borders in the East.
<span>Prior to the standard gauge track, railroad travel was much more arduous and painstaking. There were originally several types of gauges used on a railway track. This caused long train trips to require multiple stops in order to change train cars. With the standard gauge track on trains in the 1800s, multiple changes were no longer necessary and so the trips were shorter.</span>
The answer is secret service
The advantage of an assembly line is that he has to think less aout what needs to be done as it automates the whole process, a disadvantage of the assembly line is that the required output is much higher than it was required of workers in previous periods.
