Question

which layer of earth is the thinnest?
o mantle
o inner core
o crust
o outer core

Explanation:

The Earth has four main layers - crust, mantle, outer - core, and inner - core. The crust is the outermost layer and is the thinnest. The mantle is much thicker, and the core (both inner and outer) is also thicker than the crust.

Answer:

crust