Arrange earth’s layers from the coolest layer to the hottest layer. outer core lower mantle upper mantle crust inner core

The correct sequence is crust > upper mantle>lower mantle> outer core>inner core.

The inner part of the earth is the hottest layer and then the layers keeps on cooling. The core is made of the molten material and the temperature there is very high and then the layer above core is mantle and it is also hot but not as core.

The coolest layer on the earth is crust.