Building empires would be included in which theme of historical study?

number   5 i know this because savannah was the first capital and i took the test and all you have to do is look up a map of georgia savannah.

which statement explains one of the reasons world war 1 was so much more destructive than earlier conflicts

can someone me with this question:  

1) the end of the conflict between the north and the south didn’t just mark the end of a war; it marked the end of an entire way of life.” which statement best describes what this statement means?  

a) the southerners were no longer free and were controlled by the northern states.

b) the industrial economy in the north was not sustainable.

c) slavery became illegal, which changed completely the south’s labor force and the agricultural economy was destroyed.

d) the states decided to relinquish their independence and return to britain’s rule.