When two separate regions possess qualities that would work to complement each if unified into one unit it is called autonomy.
The world's land and water areas are divided into subregions geographically separated by key geological features that influence large-scale ecosystems such as plains and landforms.
Language, government, or religion can define a region, as can forests, wildlife, or climate. A region, whether large or small, is the basic unit of geography. The Middle East is considered a political, ecological, and religious region possess that includes parts of Africa, Asia, and Europe.
Physical features include topography, climate, soil, and natural vegetation. For example, the peaks and valleys of the Rocky Mountains form a physical realm. Some regions are characterized by human features. These include economic, social, political, and cultural characteristics.
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