The periodic reapportionment that the Framers of the Constitution thought about allows the government to periodically reallot US congressional seats according to changes in population. This is a very important process for the US Congress. If the Framers had not provided periodic reapportionment, as the population changed over time in different states, then Congress might have struggled keeping up with these changes. In other words, Congress would no longer represent the population of the country fairly.
The correct answer is water. Since the landscape of this region is mostly desert, Kara Kum and Kyzl Kum, water was the vital source for the civilizations of this region to make settlements and grow crops. Great civilizations of this region were build in the valleys of big river systems.
Southwest Native Americans lived in Adobe homes. These houses had many levels in them and were made from clay and straw bricks. They were cemented together with adobe.
