Which intermolecular force depends on the formation of temporary dipoles? a) dipole-dipole forces b) hydrogen bonding c) dispersion forces d) ionic bonding

The a answer is c, dispersion bonding. London dispersion forces  are temporary forces that result when adjacent molecules form  instantaneous or temporary dipoles.          

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).