Which layer of the Earth produces convection currents which move tectonic plates?

Geologists use  seismic waves to  locate an earthquake's epicenter.. 

Western europe's proximity to water has affected its climate since large bodies of water in the moderation of air temperature of the surrounding areas. the economy is also affected since it is great for the economic growth of the region. this allows easy access to trade for europe. culture is also affected by the proximity of water through the pattern of their day-to-day living.