Water is the control.......
Europe's physical geography, environment and resources, and human geography can be considered separately. Europe's rich agricultural and industrial diversity has made the continent a centre of trade and commerce for centuries. It is centrally located between the two other “Old World” continents, Africa and Asia.
Europe did use to have lots of larger states and empires but most of them have broken up and are mostly arranged along ethnic lines. So there aren't many multi-ethnic states left in Europe anymore and a lot of these states were created due to wars.
Answer:
c. The downgoing slab takes along water, and that water lowers the temperature at which rock melts to allow melting in and near the slab.
Explanation:
A subduction zone occurs when one of the plates at convergent boundaries, an area where tectonic plates meet, is an oceanic lithosphere.
These oceanic plates are high in temperature on formation but as they cool, they descend into the mantle below. This descent applies pressure until water is liberated from the lowering crust. The water in turn rises into the surrounding mantle and lowers the temperature at which the rocks melt to produce magma which are partly melted rocks.
This liberation of water from the subducting crust and accompanying melting is responsible for the formation of almost all magma at subduction zones.
