Iceland is made out of a Mid-Ocean ridge called the Mid-Atlantic Ridge in the North Atlantic Ocean. They form underneath the ocean, deep in the Earth convection currents ring molten material up to the upper mantle. This material rises through cracks between oceanic plates that are moving away from one another.
I think c is the Dead Sea, so A is your best guess
Answer:
plate boundaries
Explanation:
Volcanoes and earthquakes are most likely to form along plate boundaries.
Earthquakes:
An earthquake is generated when two plates move relative to each other. The earthquake itself, is the movement felt on the surface caused by the movement of the tectonic plates at their boundaries. There are a few different types of plate boundaries, NOAA does a great job giving a brief description of each here:
http://oceanexplorer.noaa.gov/facts/plate-boundaries.html
I think it is C. However, it should just be rock and water/ice.
