Provide two examples of SYSTEMS as well highlight some ELEMENTS unique to each system.

For example, lets look at a city as a type of system. The interrelated elements of a city are people, cars, pollution, streets, etc. Incorrect elements would be the government, the spoken language, ethnicity of citizens, asphalt, etc. The simple way to tell whether something is a valid element of a system is if you can immediately notice a change in the system when any of these elements increases or decreases, improves or worsens, etc. (remember that a system exists as a set of interrelated elements such that one element affects the behavior of the whole set).