Describe the composition of the core of the earth. select one: the inner core is composed of liquid iron surrounded by a solid nickel-iron alloy out core. the inner core is composed of solid iron surrounded by a molten nickel-iron alloy outer core. both the inner and outer cores are composed of molten iron, with the core being a higher temperature. the inner and outer cores of the earth are both composed of a solid nickel-iron alloy, with the inner core having a higher density.