There are no set social classes
The four main parts of North America are:CanadaUnited StatesMexicoGreenland
The four levels of Egyptian Society are Pharaoh Nobles Scribes and Craftspeople and Farmers, Servants, and Slaves.
There are four political entities in North America. The four political entities are Canada, France, United States, and, of course, Mexico.
The four distinct environments in North America are taiga, tropical forest, temperate forest, and tundra.
The four continents are Asia, Africa, Europe, and North America.
The Indian Ocean does not wash upon the shores of North America.
Canada
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Asia, North America, Africa, and Europe
North America, South America, Australia, and Antarctica are the four continents without an Islamic State.
Look the four corners
The four continents touching the Atlantic are North America, South America, Europe and Africa.