The movement of tectonic plates is inferred by many scientists to be driven by A) solidification in the lithosphere B) density differences in the troposphere C) convection currents in the asthenosphere D) tidal motions in the hydrosphere

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Answer glacier terminus;

Answer b is the answet

There is no map, maybe give the link, it may be b