The correct option is The core made of Nickel and Iron..
Explanation
Historically, the internal structure of the Earth was classified based on chemical composition by Edward Suess. This classification divides the Earth into three concentric layers: Sial, Sima, and Nife.
Analysis
- Nife is an acronym derived from the chemical symbols of the dominant elements found in this layer: Ni (Nickel) and Fe (Ferrum, the Latin name for Iron).
- This composition describes the Core (also known as the Barysphere), which is the innermost layer of the Earth.
- The presence of heavy metals like Nickel and Iron accounts for the core's extremely high density and is responsible for the Earth's magnetic field.
- For comparison:
- Sial (Silica and Aluminium) refers to the upper continental crust.
- Sima (Silica and Magnesium) refers to the oceanic crust and lower crust.
Key Takeaway
Nife refers to the Earth's Core, signifying a composition dominated by Nickel and Iron.