Concept:The Earth’s core is composed mainly of heavy metallic elements.
Its dominant components are iron and nickel.
Explanation:The Earth has two core layers: the inner core and the outer core.
Both layers consist mostly of iron (
Fe) with a significant amount of nickel (
Ni).
These metals give the core its high density and magnetic properties.
Silicon, calcium, and magnesium are lighter elements.
They are found mainly in the Earth’s crust and mantle rather than in the core.
Hence, only the pair iron and nickel correctly represents the core’s chief elements.
Answer:B. Iron and Nickel