The three layers that I could think of are User interface, Client side, and server side.
The three main layers of the comet is nucleus, coma, and the tail.
The three main layers that make up Earth is:CORE, MANTLE, and the CRUST
crust mantel core the three main layers
the core, the mantle and the crust
The three main interior layers of the Sun is the core, radiative zone, and convection zone.
The three main layers that make up Earth is:CORE, MANTLE, and the CRUST
pie pie layer
Medulla layer
Crust, mantle, and core
Crust, mantle, and core
Skin usually has three main layers - the exterior epidermis; the middle dermis; and the interior hypodermis.
Crust, mantle, and inner core.