The correct answer is option A, that is, more dense.
The organization or differentiation of the Earth into layers is perhaps the most substantial incident in its history. It resulted in the generation of a core, a crust, and finally the continents. The different layers, that is, the core, mantle, crust, and ocean possess different densities, and thus, their masses are also distinct.
The core of the Earth is made up of denser solid iron-nickel alloy in the inner core, and liquid iron-nickel present in the outer core.
