Which city used the sea as a channel for trade with other lands?
a. athens
b. sparta
c. athens and sparta

The answer is Athens or letter a.  The Athenians were a sea-faring race and they had major ports that they used for trade.  They traded with other countries and this helped contribute to the growth of Athens’ growth a state which later led to her Golden Age.

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.

ask an adult bc this is too hardcore