Question

What is types of layers and earth

Answer 1

There are three types of layer in which
1. crust
2. mantle
3.core

Answer 2

 The layers are from the exterior to the interior and are largely grouped into four including: the crust, the mantle, the outer core, and the inner core.
or

earth can be divided into three main layers: the core, the mantle and the crust. Each of these layers can be further divided into two parts: the inner and outer core, the upper and lower mantle and the continental and oceanic crust. Both the inner and outer core are made up of mostly iron and a little bit of nickel.