Slavery obviously. The North had more factories and they farmed food products. A large Southern export was cotton. The North also had a higher population, more cities. The South had more military bases. How many do you need?
The missing word in the statement above is: life satisfaction. Most middle-aged adults list life satisfaction as the most important factor in happiness. According to the experiments related to life satisfaction, people become older because they become wiser and more knowledgeable and they begin to see that life would be better. This is based from the psychologists, Yuval Palgi and Doc Shmotkin.
The best patriot who helped all the nation was George Washington.
The correct answer should be parking lots.
Most new parking lots are built underground so as to prevent using up large areas and look ugly in the middle of the street. Even around residential units there are no parking lots because they are found under the building.