Which of the following best describes an island arc?
An archipelago formed of a series of volcanoes rising above sea level associated with an ocean trench and destructive plate margin.
2 )
An underwater mountain range associated with sea-floor spreading at a constructive plate boundary.
3 )
A linear lowland area between highlands formed as tectonic processes begin to pull tectonic plates apart.
4 )
Linear mountain ranges formed as two or more tectonic plates are pushed together often causing layers of sedimentary rocks to buckle and warp.
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