Plate.
Another word for Earth's outer surface is "crust."
Another word for the Earth's crust is lithosphere. It is the solid outermost layer of the Earth.
the lithosphere and the crust of the earth are the same lithosphere is another word for crust so the thickest is both of them.
Soil
another name for a frontal section?
No. As the word "core" might imply, it is the innermost part of Earth. The outermost layer is the crust.
Another word for earth's upper mantle is lithosphere.
Sectionalism is another word for favoring one section of the country over another
The crust or the surface.
fragment
commerce section
Another word for the earth's surface is "ground" or "terrain".