Which of the following was a key to the north winning the civil war

What is the main idea of this excerpt? 1.1.3

Which of the following areas was not part of roman empire? a: syria c: bridges b: forums d: aqueducts h.e.l.p asap

1)which is the following was characteristic of the british colonies but not the french or spanish religion a. presence of slavery b. religion conversion c. smuggling and piracy d. strict racial hierarchy 2)how did the columbia exchange affect europe? a diseases from the new world decimated the population of the european continent b new crops introduced to europe generated further interest in the new world c enslavement of american indians in europe changed cultural attitudes toward slavery d the items produced by american indians become objects of competition in europe