Earth can be considered as a closed system, since it only receives sunlight (energy), while the overall mass stays constant, without (almost) any exchange from space. Another example of a closed system is a saucepan or frying pan, on a stove, when its lid is closed.
Answer:
Hi how are you doing today Jasmine
American because we live in a society where money is dominant and everybody needs it to survive and in East Africa you know you don't really have anything real life quality is really like low