How do you find a total of displacement

we can find the total displacement by having the sum of distance from the beginning to the ending.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

answer///terminator or twilight zone;