Europe's economic base has moved from?
It is not completely clear whether you are asking about geographical movement or more of an economic movement. I will assume that you are asking about “movement” in a figurative sense, not in the sense of an economic base moving from one country to another.
I believe the best answer to this question is that Europe’s economic base has moved from manufacturing to services. In the past, Europe was a very industrial area. Its economy was based on making things in factories. Every country would mainly be involved in making physical goods like steel or automobiles. Today, this is no longer true of most European countries or of countries in the rich world in general. In general, manufacturing jobs have moved to places where wages are lower. Instead, rich world economies like those of Europe are now dominated by people who provide services. These service jobs include low-paying and low-skilled jobs like being a waiter as well as highly paid and high-skilled positions like lawyer, doctor, or architect. Today, what drives the European economy is this sort of white collar work, not the blue collar manufacturing that was once dominant.