A wall stands using gravity. It is constantly being pulled down. Many also place them in ways that they dig into the ground, and almost make a socket just for the wall to be placed, using the land that is there. More and more walls are placed and eventually, they make flooring and a roof.
Hope that helped!
<span>elating to, or financially supported by one or more church parishes:</span>
Costa Rica
Colombia
Chile
I think its B C D are the ones that fit the most