This triangle of trade between Africa (mostly the western coast of Africa), America, and the British Empire is called the Trans-Atlantic Trade because the trade between them was taking action by boats who were taking voyages in the Atlantic Ocean because it is the one that connects all of the three places.
It regulates power between the branches of government so if u wanna say that congress wants to pass a law thats unconstitutional the judical branch steps in and tells them you cant do this