Question

which layer are further divided into 2 parts?

Answer 1

Earth can be divided into three main layers the core and the mental and The crust each of these letters can be further divided into two parts the inner and the outer Core

Answer 2

there are three layers three of them is divided in two parts
crust, core, mantle
crust-continental crust and oceanic crust
mantle-upper mantle,lower mantle
core-outer core , inner core