The Indian Ocean trade routes used the geography to their advantage by utilizing the several islands along the way. The increased ports allowed for more goods to be traded, trade began over the Sahara desert as the Chinese people sent out envoys to scope the land. (Hope this helped you) :)
It would be the "legislative branch" that is divided into two separate chambers--one is called the Senate and the other is called the House of Representatives. This is called a "bicameral" legislature.
They basically had the same motive which was to contain communism