The Andes are labeled with number 4.
The region labeled with number 3 is Patagonia.
Answer : Gulf Stream
The Gulf Stream is a strong ocean current that brings warm water from the Gulf of Mexico into the Atlantic Ocean. It extends all the way up the eastern coast of the United States and Canada.
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The magma that rises out of them cools eventually, with some help from the water. eventually all the cooled magma builds up into an island.
It is a state with very little population and/or small land area
