How does fuel (safely) get from the tank to the engine?

It would seem logical to just draw gas from the lowest point of the
tank into a fuel line leading to the engine. But contrary to a car, an
airplane can experience negative gs, and especially in aerobatics, for
prolonged periods of time. So a pump connected to the lowest point of
the tank would only draw fumes at some point. How is this problem
solved?

Thanks (again) for enlightening me,
Oliver