Final answer:
The predominantly molten layer of the Earth is the e. outer core, which consists of liquid iron and nickel and generates the magnetic field.
Step-by-step explanation:
The major layer of the Earth which is predominantly molten is the e. outer core. Earth's outer core is composed of liquid iron and nickel and is responsible for generating the Earth's magnetic field.
While the mantle is more or less solid and can deform and flow slowly, it is not predominantly molten like the outer core. The inner core, although composed of the same materials as the outer core, is solid due to the immense pressure it is under.