Design E-R diagram for a database of an Airline-System. The database must keep track of Customers and their Reservations, Flights and their status, Seat assignments
on individual flights, and the Schedule and Routing of future flights. Your design
should include primary-key and foreign-key.

How either some or all of the organisms in this activity are related to one another based

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.