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
The center of the Earth is made up of two layers, the outer core and the inner core. The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth's magnetic field.
Bankers , merchants, and government builders in Rome belonged to the equestrian class.
