Explanation
The correct option isCrust, Mantle, Core
The interior of the Earth is composed of concentric layers distinguished by their chemical composition and physical properties. These layers are arranged according to density, with the least dense material at the surface and the densest material at the centre.
Layer Sequence Analysis:
- Crust: This is the outermost solid layer of the Earth. It is brittle in nature and has the lowest density among the layers. It extends from the surface to the Mohorovičić discontinuity.
- Mantle: Situated directly beneath the crust, the mantle extends to a depth of approximately 2,900 km. It is denser than the crust and constitutes the bulk of the Earth's volume.
- Core: The innermost layer is the core, located beneath the mantle and extending to the centre of the Earth (approximately 6,370 km deep). It is composed primarily of heavy metals like nickel and iron (NIFE) and has the highest density.
Therefore, the correct order from the surface to the centre is Crust → Mantle → Core.
Key Takeaway:
The Earth's structure follows a density-based stratification from the surface downwards: Crust (outermost), Mantle (intermediate), and Core (innermost).