Correct Answer: mantle

Solution : The correct option is the mantle.

The mantle is the layer of the Earth that separates the crust from the core. The crust, mantle, outer core, and inner core are the most common layers of the Earth's structure. The mantle is located under the Earth's crust and extends to a depth of roughly 2,900 kilometres below the Earth's surface. It is made of solid rock that may flow across geological timeframes and plays an important role in plate movement and heat transport from the Earth's core to the surface.