What significant change in the distribution of the american population became known in 1920?

The significant change in the distribution of the American Population that became known in 1920's was the distribution of people between urban areas (cities, factories) to rural.

Towns and small farms are usually for land, lakes, rivers, and seas.they also produce other food, like crops.it's also where animals are, where we get our meat.large plantations normally have forests, where crops are grown for sale. (similar to farms)plantations have larger fields of crops.our wine, sugar canes, and fruits come from plantations.