PLEASE HELP!!!!
What is Layer 4?
O it is the semi-solid, upper mantle
O it is the solid, dense crust
O it is the liquid, slow moving outer core
O it is the solid, quickly rotating inner core


PLEASE HELP What is Layer 4 O it is the semisolid upper mantle O it is the solid dense crust O it is the liquid slow moving outer core O it is the solid quickly class=