______ is the Earth’s outer core.

The correct answer is: C

The correct option is c)C.

• The core consists of two layers, the outer core and the inner core, which adjoin the mantle. The boundaries separating these regions are called Bren discontinuities.
• Outer core The outer core, about 2,200 km (1,367 miles) thick, is composed primarily of liquid iron and nickel.
• The outer core is the third layer of the earth.
• It is the only liquid layer and consists mainly of the metals iron and nickel and small amounts of other substances.
• The outer core is responsible for the Earth's magnetic field.
• When the Earth rotates, the iron contained in the liquid outer core moves.