There were many rivers and seas within the Roman Empire. How could that have benefited the Roman Empire?

Protection and Economy

Explanation:

Well, this is just a guess, and I'm a 7th Grader, so lets get it. One way the Rivers and Seas could benefit the Roman Empire is, they can prevent attacks, because the Roman Empire was a large, and most likely very hated by many other Empires, and groups. It also is a very good way for economy to grow, because they could do fishing at the rivers, which is a great way to make money, especially as a Poor Citizen!

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.

is there answer chooses?