The constitution for the U.S.
Representative democracy is the most effective form of government. One government that is representative democracy is the United States. They are one of the most powerful and important countries. In the U.S. every citizen has a say in government. In a representative democracy everyone has rights. Therefore everyone can vote and have freedom of speech. In the U.S. the government is limited and not above the law because of a constitution that limits government. A constitution tells the government what they can do and what they can't do. That makes sure that the government doesn't gain too much power and turn out like a dictatorship. An representative democracy is the best form of government. A country that has a representative government is the U.S.. They have a constitution that limits government and every citizen has rights. Such as freedom of speech, and can vote. As long as everyone follows their responsibility countries like the U.S. whose government are an representative democracy are always successful.
A good citizen follows laws and uses their rights. For example they vote for the president and senators, because it's their right to vote. It is their responsibility to pay taxes or else they will go to jail. Another responsibility for good citizens is following the law. If they don't they will be fined and go to jail. Worse than going to jail it wouldn't be right to for example commit murder. They wouldn't be social because they wouldn't be accepted by society. A good citizen stands up for their rights and stands up for people. A very good citizen would be a good leader and they would respect others.
Since almost all the EU has a common market they have a common currency.
Within supranational cooperation, there are often centripetal/centrifugal forces that unite/divide nations. All of Europe has a common market that unites it by making no tariffs, the same currency etc.. A common market means they all use the same currency (the Euro). Also there are no tariffs so all countries don't have to pay tax to ship to different countries in the EU. Even though the cultures are very different the EU unites all of Europe. All borders in the EU are open so it allows citizens of a different country have jobs in other countries. Overall the EU unites European countries together. The EU also creates jobs for people who live in different countries. Just like having a job in another state in the U.S.. Most importantly the EU is a great way to connect all of Europe.
People don't grow cash crops to prevent desertification at the remaining oases.
How do people adapt to living in a desert region.
People adapt to living in a desert region many different ways. People grow only plants they need at the oases. They don't grow cash crops to avoid desertification at the remaining oases. All cash crops need lots of water and with a ongoing drought in the Sahara they can't lose the water at these precious oases. People move around for many reasons. They move from oasis to oasis so they don't run out of water. Also to give their cattle new grass to graze upon. Which is partially shifting agricultural. It's hard to live in a desert region but people do it. They use only the resources they need and move constantly to avoid desertification in the ever lasting drought there. They are constantly battling desertification so they develop these ways to avoid it.