For any terrestrial planet in the solar system the what would be the densest layer

All of the planets in the Solar System, be it the inner or outer planets, have several layers from which they are composed of. The densest layer is always the deepest layer, the one that is forming the basis of the planet, or as we refer to it, the core of the planet. Depending on the planet, they can have a core that is pretty much the same in structure, or to have slight differences and be divided into inner and outer core. In the core, the planets have the biggest amount of their mass, and they are the densest in this part.

the correct answers are:

a - pacific plate;

it is the biggest oceanic tectonic plate. surrounded on all sides by continental tectonic plates, it is submerging and gradually becoming smaller and smaller.

b - north american plate;

huge continental plate, occupying big portion of the northern hemisphere.

c -eurasian plate;

alongside the north american plate, it is one of the two dominant continental plates in the northern hemisphere.

d - indian plate;

a small continental plate, that has been part of gondwanaland initially, but after the break up of it, moved towards northeast and pushed into the eurasian plate that was once part of laurasia.