1. Compare and contrast rail travel before the Civil War with rail travel after the Civil War? What inventions help bring about these changes?

Railroads made the difference of logistics during the Civil War for the north and after the Civil war only did the rail become a nationwide phenomenon.

Explanation:

The railroads of the country before Civil war were a very new phenomenon. They had been constructed largely in the industrial north and the west and the south had either sparse railroad or none at all.

In the Civil war the rail proved to be a deciding factor as the north was able to use it to their advantage while the South was not.

After the war the invention of the small gauge track changed the scenario as the rail could be laid down nationwide and the process could be centralized,

By the 1880s the whole country had a robust railroad system from north to South and East to west.

Compare & Contrast: The source of fuel in rail network before and immediate after the civil war was same that is steam functioned engine. Global transportation of foods and goods took place after the civil war.

Availability of suitable land for spreading railway tracks, capital investments are some of the inventions helped to bring changes.

Explanation:

In earlier period the connectivity of railway track was in very limited space between small distances. But later then the area extended and took the area under coverage of railway development. And at the same time it was used for shipping food, goods and weapons at the time of emergency.

The number of coaches enhances in the train after civil war. Technological revolution make the journeys more comfortable and useful one at the time of need. Water transportation also developed in large scale then.

the first historical instance of china engaging in internationalism was during the han dynasty.[1] at the start of the han dynasty, the huns in the north were attacking the frontiers of han and trying to obtain riches. emperor wu of han wanted to gain an alliance with a country called dayuezhi so the two countries could join together and fight against the huns.[2] to obtain this alliance, emperor wu sent zhang qian to the west to establish economic and cultural connections.[2] history records that during the han dynasty there were four primary avenues of contact between china and europe. they included the northern land route, the central land route, the southern sea route, and the far southern sea route.[1] the most famous of these routes is the central land route, or the classical silk road, comprising a network of roads stretching from northwest china to the ports of syria and the black sea, which passed through the oasis of the turkestans and northern persia.[1] the silk road was significant for chinese emperors because it provided dominance over central asia by developing resources and provided new markets for the export of china's most valuable resources.[1]

the answers is b.   environments.