1. (Religious answer) Because Abraham wouldn't worship false idols with his nephew, so he and his wife Sarah, left to settle in a different land which happened to be in the fertile crescent.
2. Because being close to the rivers and the floods made good farm land.
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Work means to work for a job and work hard around the house snd work hard to get what you want to achieve and sell services means to sell things
Miranda v. Arizona
In Miranda v. Arizona, the Supreme Court ruled that detained criminal suspects, prior to police questioning, must be informed of their constitutional right to an attorney and against self-incrimination.