The answer you are looking for is "<span>a. elements of ecosystems are mutually dependent on each other ".</span>
In the United States of America, you must at least 18 years of age to vote.
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The tree largest religions in Western Europe are the Christianity, Islam, and Judaism.
Depending on the county in Western Europe, there are differences in the type of Christianity type practiced, with the Catholicism and Protestantism being the most dominant ones. The Islam is the second largest religion, relatively new in this part of the continent and also a relatively quick growing one. The Judaism is the third largest religion in this part of Europe, but it has much less followers than the top two. The atheism is worth mentioning, despite not being a religion but the opposite of it, as the non-religious population in Western Europe is actually the second largest one, in front of the Islam and Judaism.
The culture of this region has largely been shaped and set on the foundations of the Christianity, mostly the Catholicism, with later diverging fraction of it. The Church has played a big role in the societies, politics, economy of this region for almost two millenniums, so it is carved in the cultural aspects of the nations living there.
The human settlements hierarchy is as follows:
- An ecumenopolis is a theoretical construction in which the entire area of Earth that is taken by human settlements, or at least, that those are linked so that to create an urban areas so big that they can shape an urban continuum through thousands of kilometers.
- A megalopolis is a group of conurbations, consisting of more than ten million people each.
- A conurbation is a group of large cities and their suburbs, consisting of three to ten million people.
- A metropolis is a large city with it's suburbs, consisting of multiple cities and towns.
- A large city is a city with a large population and many services.
- A city has many services, but not as many as the large city.
- A large town is a town with population of 20,000 to 100,000 people.
- A town has a population of 1,000 to 20,000 people.
- A village is a human settlement or community that is larger than a hamlet but smaller than a town.
- A hamlet has a very small population, very few services, and only few buildings.
- An isolated dwelling has only 1-2 buildings.
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