What area of the earths mantle is the densest

The lower area of the Earth's mantle is the densest.

Explanation:

The upper part of the mantle is constituted of magma and other semisolid material. The tectonic plates of the 'Earth's crust' float on this magma that is present in the upper mantle. The lower mantle is denser than the upper mantle and is made up of solid material. It forms the boundary between the semisolid upper mantle and the semisolid outer core of the Earth.

Avertical or horizontal line used in graphs is called a(n) equatorhope this

Answer sinking and cooled;