According to the section 8 housing, they pay less money for rent and the rest is subsidized by the government because they are considered by law to be a low income family. The rented apartments that are owned privately get paid for in part by the Department of Housing and Urban Development to make it easier for people with low income to live.
With the melting Ice caps the Ocean around us is rising. Making the land around the U.S. shrink. Now if we are talking in the past the land became larger around the iceage because of the freezing water.
The last one I think I could be wrong