2 tectonic plates meet at the regions edge
Answer:
cali is dry outside of the mountains
Answer: volcanic activity
Explanation: The vast majority of volcanic activity on the planet occurs along the mid-ocean ridge, and it is the place where the crust of the Earth is born. The material that erupts at spreading centers along the mid-ocean ridge is primarily basalt, the most common rock on Earth.
Scientists believe convection currents are the force behind the plate tectonics theory.