It is important to fulfill our obligations, such as voting and being involved, of citizenship so we get a say so in what goes on and happens. Voting is a very simple and easy way to fulfill your obligations of citizenship because you are taking part and putting YOUR own opinion in something that affects the entire nation. Hope that somewhat helps.
Because moving traded goods great distances by floating them on the water is just about the easiest and cheapest way to deliver them from one place to another place.
