Which of the following is the main political unit in the world?
a. the state
b. the township
c. the city
d. the county

Which answer best describes an advantage of shipping goods by canal? most towns would rather have canals than noisy railroads. goods could travel very fast downstream in the canal system. travelling by boat is a much more relaxing way to transport goods. heavy loads of goods could travel by boat more easily than if pulled by horses.